let N= 1007276145 and f(x) = e^(x−1)(b − x). 1. Find f'(x), f^2(x), and f^3(x). 2. Find b such thatf^(N+2020)(2N) = 0.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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let N= 1007276145 and f(x) = e^(x−1)(b − x).

1. Find f'(x), f^2(x), and f^3(x).
2. Find b such thatf^(N+2020)(2N) = 0.

Expert Solution
Step 1

Given:

fx=ex-1b-x

Using product rule of differentiation (fg'x=f'xgx+fxg'x ) , we get 

f'(x)=e(x-1)(b-x)-e(x-1)

f''(x)=e(x-1)(b-x)-e(x-1)-e(x-1)f''(x)=e(x-1)(b-x)-2e(x-1)

f'''(x)=e(x-1)(b-x)-e(x-1)-2e(x-1)f'''(x)=e(x-1)(b-x)-3e(x-1)

 

 

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