Question

Integral

Answer 1

\[\int\limits_{0}^{1}f(x)dx \]
is same

\[A. \int\limits_{1}^{2}f(x+1)dx\]
\[B. \int\limits_{1}^{2}f(x-1)dx\]
\[C. \int\limits_{-1}^{0}f(x+1)dx\]
\[D. \int\limits_{-1}^{0}f(x-1)dx\]

Answer 2

is B? can explain me