Please help me calculate these integrals.(adsbygoogle = window.adsbygoogle || []).push({});

Suppose that ∫f(t)dt=11 [0,1]. Calculate each of the following.

A. ∫f(4t)dt [0,0.25] =

B. ∫f(1−4t)dt [0,0.25] =

C. ∫f(3−8t)dt [0.25,0.375] =

I did the first one and I beleive is right and I try to do the 2nd and 3rd one similarily and can't get them .:uhh:

u=4t

du=4dt, or

dt=(1/4)du

∫f(4t)dt [0,0.25]

=∫f(u)(1/4)du [0,4*0.25]

=(1/4)∫f(u)du [0,1]

=(1/4)*11

=11/4

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# Homework Help: Integration (Substitution)

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