Find the Fourier series of f (x)= x^3 in x = Π to Π Watch later Share Copy link Info Shopping Tap to unmute If playback doesn't begin shortly, try restarting your device Up next In order to find for any function f(x), we must apply the 'transformation' y=x In order to do that, we must define x in terms of y, ie, find f(y), then set y=x Let y=f(x) y=(x3)^31 y1=(x3)^3 x3=root(3)(y1) x=3root(3)(y1) We've now found f(y), so we must set y=x by replacing x with y and y with x f^1(x)=y=3root(3)(x1) Explanation First of all, let's compute the derivative of f (x), indicated as f '(x) f (x) = − x3 −3 ⇒ f '(x) = −3x2 In fact, to derive a sum you must derive each single term The first term is a power of x, and the derivative of xn is nxn−1 So, the derivative of x3 is 3x3−1 = 3x2, and since we had a minus sign in front of it, we will have to change signs the derivative of −x3 is −3x3−1 = −3x2

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F(x)=x^3 is one one or onto
F(x)=x^3 is one one or onto- Ex 12, 10 Let A = R − {3} and B = R − {1} Consider the function f A → B defined by f (x) = ((x − 2)/(x − 3)) Is f oneone and onto?Replace the variable x x with 3 3 in the expression f ( 3) = − ( ( 3) − 3) 3 2 f ( 3) = ( ( 3) 3) 3 2 Simplify the result Tap for more steps Simplify each term Tap for more steps Subtract 3 3 from 3 3 f ( 3) = − 0 3 2 f ( 3) = 0 3 2 Raising 0 0 to any positive power yields 0 0




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Given f (x) = 3x 2 – x 4, find the simplified form of the following expression, and evaluate at h = 0 This isn't really a functionsoperations question, but something like this often arises in the functionsoperations context This looks much worse thanGraph f (x)=x^3 f (x) = x3 f ( x) = x 3 Find the point at x = −2 x = 2 Tap for more steps Replace the variable x x with − 2 2 in the expression f ( − 2) = ( − 2) 3 f ( 2) = ( 2) 3 Simplify the result Tap for more steps Raise − 2 2 to the power of 3 3 The function f(x) is continuous at point a if and only if the limit lim_(x>a) f(x) exists and equals f(a) So to prove that a function is continuous first you have to calculate the limit lim_(x>1) (x2x^3)^4=(1(1)^3)^4=(2)^4=16 The limit exists, so now you have to calculate f(1) and check if the value equals the limit f(1)=(1(1)^3)^4=(2)^4=16 The calculation shows, that f(
X!af(x), we can derive many general laws of limits, that help us to calculate limits quickly and easily The following rules apply to any functions f(x) and g(x) and also apply to left and right sided limits Suppose that cis a constant and the limits lim x!a f(x) and lim x!a g(x) exist (meaning they are nite numbers) Then 1lim x!af(x) g(xA teacher at a secondary school in London reviews equations on a whiteboard Credit Peter Macdiarmid, via GettyShort Solution Steps f ( x ) = x ( 1 \frac { 4 } { x 3 } ) f ( x) = x ( 1 − x 3 4 ) To add or subtract expressions, expand them to make their denominators the same Multiply 1 times \frac {x3} {x3} To add or subtract expressions, expand them to make their denominators the same
− x − 3 (x − 3) = 1;Solution for f(x)=x^39 equation Simplifying f(x) = x 3 9 Multiply f * x fx = x 3 9 Reorder the terms fx = 9 x 3 Solving fx = 9 x 3 Solving for variable 'f' Move all terms containing f to the left, all other terms to the right Divide each side by 'x' f = 9x1 x 2 Simplifying f = 9x1 x 2F ( x) = 3 x 3 − x 2 By Rational Root Theorem, all rational roots of a polynomial are in the form \frac {p} {q}, where p divides the constant term 2 and q divides the leading coefficient 3 One such root is 1 Factor the polynomial by dividing it by x1 Polynomial 3x^ {2}3x2 is not factored since it does not have any rational roots




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Since f(−x) = e− (− x) 2 2 = e− 2 = f(x) and lim x→±∞ e− (−x)2 2 = 0, the graph is symmetry wrt the yaxis, and the xaxis is a horizontal asymptote • Wehave f0(x) = e−x 2 2 (−x) = −xe− x2 2 • Thus f ↑ on (−∞,0) and ↓ on (0,∞) • Atx = 0, f 0(x) = 0 Thus f(0) = e = 1 is the (only) local andF (x) = ⎩ ⎪ ⎪ ⎨ ⎪ ⎪ ⎧ (x − 3) (x − 3) = 1;Mathf(x)=x/math Function is giving the absolute value of mathx/math whether mathx/math is positive or negative See the y axis of graph which is mathf(x)/math against mathx/math, as x axis It shows y axis values or mathf(x




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Ex 1 3 4 If F X 4x 3 6x 4 Show That Fof X X
x inRR,x!=3 y inRR,y!=0 >"the denominator of "f(x)" cannot be zero as this" "would make "f(x)" undefined Equating the " "denominator to zero and solving gives the value" "that x cannot be" "solve "x3=0rArrx=3larrcolor(red)"excluded value" "domain is "x inRR,x!=3 (oo,3)uu(3,oo)larrcolor(blue)"in interval notation" "to find the range, rearrange making x the subject" f(x)=y=1/(x3) rArry(x3Since `lim_ (x>c)f (x)=f (c)` f is continuous at all positive real numbers Therefore, f is continuous function We will now show that f (x)=x3,x in R is not differentiable at x = 3 `lim_ (h>0^) (f (3h)f (3))/h=lim_ (h>0^) (3h333)/h=lim_ (h>0^) (h0)/h=lim_ (h>0^)h/h=1`Justify your answer f (x) = ((x − 2)/(x − 3)) Check oneone f (x1) = ((x"1 " − 2)/(x"1" − 3)) f (x2) = ((x"2 " − 2)/(x"2" − 3)) Putting f (x1) =



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Graphing Cubic Functions
Example 5 X and Y are jointly continuous with joint pdf f(x,y) = (e−(xy) if 0 ≤ x, 0 ≤ y 0, otherwise Let Z = X/Y Find the pdf of Z The first thing we do is draw a picture of the support set (which in this case is the first Any x value that makes any denominator in the function equal to 0 is a point of discontinuity So for the function above, x − 3 = 0 when x = 3, and so the function will be discontinuous at x = 3 The only exception to this is if the function is piecewise defined at potential "breaking" points, like this f ⋆(x) = { x2−9 x−3, x ≠ 3 6F (x)=x^3 f (x)=\ln (x5) f (x)=\frac {1} {x^2} y=\frac {x} {x^26x8} f (x)=\sqrt {x3} f (x)=\cos (2x5) f (x)=\sin (3x) functionscalculator f\left (x\right)=x^3




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Biomath Functions
For example, we can subtract the functions f(x) = √x and g(x) = x − 8 as, The domain of the ( f − g )( x ) consists of all x values that are in the domain of both f and g In this case, f has domain {x x ≥ 0}, and g has domain all real numbers, therefore ( f − g )( x ) has domain {x x ≥ 0}, because these values of x are in theGraph f (x)=x3 f (x) = x − 3 f ( x) = x 3 Rewrite the function as an equation y = x− 3 y = x 3 Use the slopeintercept form to find the slope and yintercept Tap for more steps The slopeintercept form is y = m x b y = m x b, where m m is the slope and b b is the yintercept y = m x b y = m x∴ f(x) = x 3 6x 2 11x 6 As f(x) is a polynomial in x (1) f(x) is continuous on 0, 4 (2) f(x) is differentiable on (0, 4) Thus, all the conditions of LMVT are satisfied To verify LMVT we have to find c ∈ (0,4) such that




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