Question

, задание с определенным интегралом

Answer 1

4) 2√3

5) (e³-1) / 12

6) (e³-e^-1) / 2

Объяснение:

4)

$\int\limits^\frac{\pi }{3} _{-\frac{\pi }{3} } {\frac{dx}{\cos^2x} } \,=\rm tg \;x\bigg|_{-\frac{\pi }{3} }^\frac{\pi }{3} =\rm tg\frac{\pi }{3}-\rm tg(-\frac{\pi }{3})= \sqrt{3}+\sqrt{3}=2\sqrt{3}$

5)

$\int\limits^1_0 {\frac{1}{4}e^{3x} } \, dx=\frac{1}{4}*\frac{1}{3}\int\limits^1_0 {e^{3x}*} \, 3dx=\frac{1}{12}\int\limits^1_0 {e^{3x}} \, d(3x) =\frac{1}{12}e^{3x}\bigg|_0^1=\frac{e^3}{12}-\frac{e^0}{12}=\frac{e^3-1}{12}$

6)

$\int\limits^1_{-1} {e^{1-2x}} \, dx =-\frac{1}{2}\int\limits^1_{-1} {e^{1-2x}*} \, (-2dx) =-\frac{1}{2}\int\limits^1_{-1} {e^{1-2x}} \, d(1-2x)=\\-\frac{1}{2}e^{1-2x} \bigg|_{-1}^1=-\frac{e^{1-2}}{2} +\frac{e^{1+2}}{2} =\frac{e^3-e^{-1}}{2}$