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Solve equation in interval

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f = x^2*exp(-x) at interval x is <-1, 1>
fder = diff(f,x,1)
i need solution for fder in interval <-1 1>, but command solve(fder, [-1 1]) not work pls help

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Accepted Answer

Bastian Arturo Romero Mardones
Edited: Bastian Arturo Romero Mardones on 29 Nov 2020
You can try:
syms x
f = x^2*exp(-x)
fder = diff(f,x,1)
vpasolve(fder,[-1 1]) %change solve

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More Answers (1)

Walter Roberson
Walter Roberson on 29 Nov 2020
syms x
solve([diff(x^2*exp(-x)), x <= 1, x >= -1])
ans = 
0

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