how to get the exact value?

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Jinquan Li
Jinquan Li 2021-2-23
回答： KALYAN ACHARJYA 2021-2-23
I'm trying to use numerical Matlab approach tp find the integral of f = 5e^-t , for -1<t<2. Here's the code i tried:
f5 = @(t) 5*exp(-t);
q = integral(f5,-1,2)
The answer is
q =
12.914732726112163
The answer I expect is -5e^(-2)+5e. How can i get the answer in this format?

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回答（1 个）

KALYAN ACHARJYA
KALYAN ACHARJYA 2021-2-23
See the Format
format shortEng

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