Find the Taylor polynomial  T3(x)  for the function f centered at the number a. f(x) = xe-2x, a = 0

Austin Lohr

Austin Lohr

Answered question

2022-10-14

Find the Taylor polynomial  T3(x)  for the function f centered at the number a. f(x) = xe-2x, a = 0

Answer & Explanation

star233

star233

Skilled2023-05-29Added 403 answers

To find the Taylor polynomial T3(x) for the function f(x)=xe2x centered at a=0, we need to find the derivatives of f(x) at x=0.
First, let's find the first few derivatives of f(x):
f(x)=xe2x
First derivative:
f(x)=(1)(e2x)+(x)(2e2x)=e2x2xe2x
Second derivative:
f(x)=(2)(e2x)+(e2x)(2)+(2x)(2e2x)=4e2x+4xe2x
Third derivative:
f(x)=(4)(e2x)+(4)(e2x)+(4x)(2e2x)+(4)(2e2x)=16e2x+12xe2x
Now, let's evaluate these derivatives at x=0:
f(0)=0e0=0
f(0)=e02(0)e0=1
f(0)=4e0+4(0)e0=4
f(0)=16e0+12(0)e0=16
Now, we can construct the Taylor polynomial T3(x) centered at a=0 using these derivatives:
T3(x)=f(0)+f(0)(x0)+f(0)2!(x0)2+f(0)3!(x0)3
Simplifying:
T3(x)=0+1(x)+42!(x2)+163!(x3)
T3(x)=x2x283x3
Therefore, the Taylor polynomial T3(x) for the function f(x)=xe2x centered at a=0 is:
T3(x)=x2x283x3

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