Answer
a)5
b)$5\sqrt{3}$
c)-5
d)-5
Work Step by Step
a)$\int_1^2 f(u) du$=$\int_1^2 f(x) dx$=5
b)$\int_1^2 \sqrt {3}f(z) dz$=$\sqrt {3}\int_1^2 f(z) dz$=$5\sqrt{3}$
c)$\int_2^1 f(t) dt$=-$\int_1^1 f(t) dt$=-5
d)$\int_2^1[-f(x)]dx=-\int_2^1[f(x)]dx=-5$
