Solve equation in interval

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Veronika Puskelova
Veronika Puskelova 2020-11-29
编辑： Walter Roberson 2021-4-22
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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采纳的回答

Setsuna Yuuki.
Setsuna Yuuki. 2020-11-29
编辑：Setsuna Yuuki. 2020-11-29
You can try:
syms x
f = x^2*exp(-x)
fder = diff(f,x,1)
vpasolve(fder,[-1 1]) %change solve

更多回答（1 个）

Walter Roberson
Walter Roberson 2020-11-29
Ran in:
syms x
solve([diff(x^2*exp(-x)), x <= 1, x >= -1])
ans = 
0

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