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Webs.comTYPES OF FUNCTIONSMichael.jacob.33633@facebook.com
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<p>Â </p><p>MathPrecalculusFunctionsTypes of Functions</p><p>Types of Functions</p><p> </p><p>The mathematical concept of a function expresses the intuitive idea that one quantity completely determines another quantity. An equation will be a function if for any x in the domain of the equation, there is exactly one value of y. More formally, a function is defined a type of relation which has only one output value with respect any permissible input value. The argument and the value may be real numbers, but they can also be elements from any given sets: the domain, the co-domain of the function and all the assigned values are in the Range of the function. It is important how we assign the values to each element of the domain.</p><p>Â </p><p>There may be different types of functions in mathematics. The classification of functions on the basis of properties may be as follows :</p><p>(1) Even Function</p><p>(2) Odd Function</p><p>(3) Monotonic Function</p><p>(4) Surjective Function</p><p>(5) Bijective Function</p><p>(6) Injective Function</p><p>Â </p><p>The functions can be classified into following on the basis of variables used :</p><p>(1) Algebraic Function</p><p>(2) Exponential Function</p><p>(3) Logarithmic Function</p><p>(4) Analytic Function</p><p>(5) Inverse Function</p><p>(6) Monotonic Function</p><p>(7) Polynomial Function</p><p>(8) Linear Function</p><p>(9) Quadratic Function</p><p>(10) Elliptic Function</p><p>(12) Identity Function</p><p>(13) Constant Function</p><p>(14) Power Function</p><p>(15) Vector-valued Function</p><p>(16) Integer-valued Function</p><p>(17) Periodic Function</p><p>(18) Piece-wise linear Function etc.</p><p>Â </p><p>In this article, we shall learn about few of the above mentioned types of functions.</p><p>Â </p><p>Â </p><p>Â </p><p> </p><p>Â </p><p> </p><p> </p><p>Types of Polynomial FunctionsBack to Top</p><p>A polynomial or algebraic function is a function which can be expressed in the following form:</p><p>f(x)=anxn+an−1xn−1+.....+a2x2+a1x1+a0f(x)=anxn+an−1xn−1+.....+a2x2+a1x1+a0</p><p>Â </p><p>In this expression, the highest power which is present in the expression is called the degree of the polynomial function. According to the degree, we have some different types of polynomial functions as follows: </p><p>Â </p><p>If the degree is one then we can say that the given polynomial function is linear.</p><p>If the degree is two then we can say that the given polynomial function is quadratic.</p><p>If the degree is three then we can say that the given polynomial function is cubic.</p><p>Constant Polynomial Functions:</p><p>It is a polynomial of the oth degree, where f(x) = cx0 = c(1) = c.It disregards the input and the result is always c. Its graph is a horizontal line.</p><p>Â </p><p>For example f(x) = 2, whatever the value of x result is always 2.</p><p>Â </p><p>Linear Polynomial Functions:</p><p>It is a polynomial of the first degree, the input should be multiplied by m and it adds to c. It is represented as f(x) = m x + c such as f(x) = 2x + 1 at x = 1. </p><p>f(1) = 2 . 1 + 1 = 3</p><p>f(1) = 3</p><p>Â </p><p>Quadratic Polynomial Functions</p><p>A polynomial of the second degree is represented as</p><p>f(x) = ax2 + bx + c, a ≠≠ 0.</p><p>Â </p><p>where a, b, c are constant and x is a variable.</p><p>For example, value of f(x) = 2x2 + x - 1 at x = 2.</p><p>Put x = 2, f(2) = 2.22 + 2 - 1 = 9</p><p>Â </p><p>Cubic Polynomial Function:</p><p>Â </p><p>A polynomial of the degree three is called the cubic polynomial and is denoted as follows:</p><p>f(x) = ax3 + bx2 + cx + d, a ≠≠ 0.</p><p>Types of Functions GraphsBack to Top</p><p>Given below are the graphs of different types of functions.</p><p>Â </p><p>Odd and Even Functions</p><p>Â </p><p>When there is no change in the sign of f(x) when x is changed to â€“x, then that function is called an even function. (i.e) f(-x) = f(x)</p><p>Â </p><p>Let us consider f(x)=2x2−3f(x)=2x2−3</p><p>f(−x)=2(−x)2−3=2x2−3f(−x)=2(−x)2−3=2x2−3</p><p>f(x)=f(−x)f(x)=f(−x)</p><p>Â </p><p>Other examples are, g(x)=cosxg(x)=cos⁡x , h(x)=ex+e−xh(x)=ex+e−x</p><p>Â </p><p>The graph of an even function is such that the two ends of the graph will be directed towards the same side. We can observe this from the following graph of y=2x2−3y=2x2−3. The graph remain unaltered when reflected about the y-axis.</p><p>Â </p><p>Types of Functions</p><p>Â </p><p>When the sign of f(x) is changed when x is changed to â€“x, then it is called an odd function.</p><p>(i.e) f(-x) = - f(x).</p><p>Â </p><p>Let us consider f(x)=x3+6xf(x)=x3+6x</p><p>f(−x)=(−x)3+6(−x)=−x3−6x=−(x3+6x)=−f(x)f(−x)=(−x)3+6(−x)=−x3−6x=−(x3+6x)=−f(x)</p><p>f(x)f(x) is an odd function.</p><p>Â </p><p>Other examples are g(x)=tanxg(x)=tan⁡x , h(x)=x5−3x3+9x+8h(x)=x5−3x3+9x+8</p><p>The following graph shows the odd function, f(x)=x3f(x)=x3 , and its reflection about the y-axis, which is f(−x)=−x3f(−x)=−x3.</p><p>Â </p><p>Types of Function</p><p>Â </p><p>Inverse Functions</p><p>Â </p><p>From every function y=f(x)y=f(x), we may be able to deduce a function x=g(y)x=g(y), such that the composition fog=Iyfog=Iy , gof=Ixgof=Ix. Meaning the composition of the function and its inverse is an identity function. In an inverse function, we may be able to express the independent variable in terms of the dependent variable.</p><p>Â </p><p>For example, y=f(x)=(x+1)x−1y=f(x)=(x+1)x−1</p><p>y=x+1x−1y=x+1x−1</p><p>y(x−1)=x+1y(x−1)=x+1</p><p>xy−y=x+1xy−y=x+1</p><p>xy−x=1+yxy−x=1+y</p><p>x(y−1)=y+1x(y−1)=y+1</p><p>x=(y+1)(y−1)=g(y)x=(y+1)(y−1)=g(y)</p><p>Â </p><p>Let us find (gof)(x)=g[f(x)](gof)(x)=g[f(x)] </p><p>=g[(x+1)(x−1)]=g[(x+1)(x−1)]</p><p>= x+1x−1+1x+1x−1−1x+1x−1+1x+1x−1−1</p><p>= x+1+x−1x−1x+1−x+1x−12xx−1×x−12x+1+x−1x−1x+1−x+1x−12xx−1×x−12</p><p>= xx</p><p>Â </p><p>Similarly, we can prove that (fog)(y)=y(fog)(y)=y, hence gg is the inverse of ff and ff is the inverse of gg.</p><p>Â </p><p>Algebraic Functions</p><p>Â </p><p>A function which consists of finite number of terms involving powers and roots of independent variable x and the four fundamental operations of addition, subtraction, multiplication and division is called an algebraic function.</p><p>Â </p><p>For example, f(x)=5x3−2x2+5x+6f(x)=5x3−2x2+5x+6, g(x)=(2x+4)√(x−1)2g(x)=(2x+4)(x−1)2</p><p>Polynomials, rational functions and irrational functions are all the examples of algebraic functions.</p><p>Â </p><p>Transcendental Functions</p><p>Â </p><p>Functions which are not algebraic are called transcendental functions.</p><p>Â </p><p>For example, f(x)=sinxf(x)=sin⁡x, g(x)=log(x)g(x)=log⁡(x), h(x)=exh(x)=ex , k(x)=tan−1(x)k(x)=tan−1⁡(x) </p><p>Trigonometric functions, Inverse trigonometric functions, exponential functions, logarithmic functions are all transcendental functions.</p><p>Types of Functions Graph</p><p>The graph along side shows the graph of y=sin(x)y=sin⁡(x)</p><p>Â </p><p>Special Functions</p><p>Â </p><p>Modulus Functions: </p><p>Â </p><p>Modulus functions are defined as follows.</p><p>y = |x | = { x, if x â‰¥ 0</p><p>-x , if x < 0.</p><p>Â </p><p>For example, | 3 | = 3, and | -4 | = -(-4) = 4, since -4 < 0.</p><p>Â </p><p>The graph of the modulus function y = |x| is shown below. </p><p>Â </p><p>Types of Functions Graphs</p><p>Â </p><p>Greatest Integer Function: </p><p>Â </p><p>The greatest integer functions are of the form y = [x]. This is also called as the step function.</p><p>Â </p><p>For example, [x]=0[x]=0 if 0≤x<10≤x<1</p><p>[x]=1[x]=1, if 1≤x<01≤x<0</p><p>Â </p><p>The graph of the greatest integer function will be as shown below. We observe that the function is a curve and is not continuous. Hence, the function is not continuous.</p><p>Â </p><p>Greatest Integer Function</p><p>Â </p><p>Constant Function: </p><p>Â </p><p>If f : R →→ {c}, defined by f(x) = c, for every xεRxεR, then f is called a constant function of R.</p><p>Â </p><p>For example, f(x) = 8, g(x) = -5 are all constant functions. The graph of the functions, y = 8 and y = -5 are shown below.</p><p>Â </p><p>Constant Function</p><p>Â </p><p>Identity Function: </p><p>Â </p><p>The identity function maps each member of the domain onto itself. That is, if I is the identity function, then for any x in the domain, I(x) = x. It is also denoted as y = x.</p><p>Â </p><p>The graph of the identity function is given below.</p><p>Identity Function</p><p>We observe that the graph passes through the points (-4,-4), (-2,-2), (0,0), (2,2), (4,4) and (6,6). This is because the relation is y = x. </p><p>Â </p><p>Circular Functions: </p><p>Â </p><p>The sine and cosine functions of elementary trigonometry and their inverses and functions derived from them. </p><p>Â </p><p>For example, f(x)=2sin(x)+5cos(x)f(x)=2sin⁡(x)+5cos⁡(x)</p><p>The graph of the function y=2sin(x)+5cos(x)y=2sin⁡(x)+5cos⁡(x) .</p><p>Â </p><p>Circular Functions</p><p>Â </p>Fri, 09 Jun 2017 05:50:00 +0000http://michaeljacob56.webs.com/apps/blog/show/44583166madMichael.jacob.33633@facebook.com
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You can only run pass mi when, when u run mad like @terrygzus @jacobjacob56Sat, 08 Jun 2013 19:15:00 +0000http://michaeljacob56.webs.com/apps/blog/show/27902172Mr carterMichael.jacob.33633@facebook.com
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Garri No Get Advert, But E Sell Pass Indomie
2)No Matter How Toms sell, ENo Go Sell Pass Slippers
3)If You Never Thief Meat From Pot B4, Then You MamaNo Sabbi Cook
4)A Girl Who Laffs @ Your dryJoke during a first date doesn't have transport money to get back Home
5)The only woman who knowswhere her man is every Night is a "Widow"
6)Bowen university is the only uni you find people kissing wif there both eyes wild open, so as not to get Caught.....
7)Say Hausa Man Poor, No mean say him NO fit afford tobuy Transitor Radio
8 )U cant kneel down to greetur parent but u can Kneel to give ur BF heads, una go explain 4 judgment day o
9)If the Alarm of a China fone cannot wake you up.....Forget it u r "DEAD"
10)To listen to CoolFM, just put ur radio in a Fridge
11)Is a small world no mean say u go trek from ur house reach malaysia o0
12) no matter how may viewsthese get moderator no go take am go front page.
13. he who laffs last...no
undastand the joke quick
14. A patient dog...na
hunger go kill am
15. A bird in hand...na beta
suya be dat 16. Pickin wey say him
mama no go slip...na
hospital him go find
himself
16. A rolling stone...na
person push am 17. What a child sees
crawling...an adult cannot
see even if he climbs a tall
treeThu, 17 Jan 2013 15:05:00 +0000http://michaeljacob56.webs.com/apps/blog/show/22515911joke Michael.jacob.33633@facebook.com
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What is the Alternatve word for VirginWed, 28 Sep 2011 14:05:00 +0000http://michaeljacob56.webs.com/apps/blog/show/8980285jokeMichael.jacob.33633@facebook.com
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The Only Time A Girl Should Fall on her Knees for A Guy, Is The day She Tie Her Son'eWed, 28 Sep 2011 14:00:00 +0000http://michaeljacob56.webs.com/apps/blog/show/8980224faithMichael.jacob.33633@facebook.com
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<p>EARNESTLY CONTEND FOR THE FAITH WHICH WAS ONCE DELIVERED UNTO THE SAINTS </p>Sun, 25 Sep 2011 09:50:00 +0000http://michaeljacob56.webs.com/apps/blog/show/8892404