A.  ${\int }_a^{b}f\left(u\right(x\left)\right)u\text{'}dx={\int }_{u\left(a\right)}^{u\left(b\right)}f\left(u\right)du$

B.  ${\int }_a^{b}f\left(u\right(x\left)\right)u\text{'}dx={\int }_a^{b}f\left(u\right)du$

C.  ${\int }_{u\left(a\right)}^{u\left(b\right)}f\left(u\right(x\left)\right)u\text{'}dx={\int }_a^{b}f\left(u\right)du$

D.  ${\int }_a^{b}f\left(u\right(x\left)\right)u\text{'}dx={\int }_a^{b}f\left(x\right)dx$

A. 2

B. 4

C. 3

D. 1

A. T= -6 

B. T =2 

C. T= 6 

D.  T= -2

A. T = –6.

B. T = 2.

C. T = 6.

D. T = –2.

A. 5/2

B. 7/4

C. 2/3

D. 6/5

A.  ${\min }_{\mathrm{x}\in \left[\mathrm{a}:\mathrm{b}\right]}\mathrm{f}\left(\mathrm{x}\right)=\mathrm{f}\left(\mathrm{b}\right)$

B. ${\min }_{\mathrm{x}\in \left[\mathrm{a}:\mathrm{b}\right]}\mathrm{f}\left(\mathrm{x}\right)=\mathrm{f}\left(x_1\right)$

C. ${\min }_{\mathrm{x}\in \left[\mathrm{a}:\mathrm{b}\right]}\mathrm{f}\left(\mathrm{x}\right)=\mathrm{f}\left(a\right)$

D.  ${\min }_{\mathrm{x}\in \left[\mathrm{a}:\mathrm{b}\right]}\mathrm{f}\left(\mathrm{x}\right)=\mathrm{f}\left(x_2\right)$

A.  $2\sqrt[3]{16}$

B.  $\sqrt[3]{18}$

C.  $\sqrt[3]{16}$

D.  $2\sqrt[3]{18}$

A. (-4;-2)

B. (-2;0)

C. (0;2)

D. (2;4)