Question

Пожалуйста!!!!!!!!!!!!!!!!!!

Answer 1

$int frac{4x+2}{x^2+8x+7}, dx=int frac{4x+2}{(x+4)^2-9}=Big [, t=x+4,; dt=dx,; x=t-4, Big ]=\\=int frac{4t-14}{t^2-9}, dt=2int frac{2t, dt}{t^2-9}-14int frac{dt}{t^2-9}=2, ln|t^2-9|-14cdot frac{1}{2cdot 3}, lnBig |frac{t-3}{t+3}Big |+C=\\=2, ln|x^2+8x+7|-frac{7}{3}cdot lnBig |frac{x+1}{x+7}Big |+C; .$

Answer 2

Там не 7, а 17

Answer 3

в знаменателе