Question

I don’t know what to do, please help.

Answer 1

Hi,

Explanation:

`\boxed{\int\limits^(b(x))_(a(x) ) \ {f(t) } \, dt =b'(x).f(b(x))-a'(x).f(a(x))}\\\\\int\limits^(x^2)_x\ {e^(t^7)} \, dt =2x.e^{({x^2})^7}-1.e^(x^7)=2x.e^{x^(14)}-e^{x^(7)}`