(2x+1)/12x^2+2-3y/18xy^2=(2x+1)(12xy^2+2-1/6xy=(2x+1+24xy^2-2y)/12xy^2
(1 15/49)¹⁰*(7²⁰/8¹⁷)=(64/49)²⁰*(7²⁰/6¹⁷)=(8²/7²)¹⁰*(7²⁰/8¹⁷)=(8²⁰/7²⁰)*(7²⁰/8¹⁷)=
=8²⁰*7²⁰/7²⁰*8¹⁷=сокращаем 7²⁰=8²⁰/8¹⁷=8(²⁰⁻¹⁷)=8³=512
<u>1.</u> если график функции x+by=3 проходит через точку (1;-1),
то значение коэффициента b:
1-b=3; b=-2
<u><em>Ответ: -2</em></u>
<u>2.</u>
![\frac{9}{x-3}+2=5\\ x\neq 3\\9+2x-6=5x-15\\3x=18\\x=6](https://tex.z-dn.net/?f=%5Cfrac%7B9%7D%7Bx-3%7D%2B2%3D5%5C%5C%20x%5Cneq%203%5C%5C9%2B2x-6%3D5x-15%5C%5C3x%3D18%5C%5Cx%3D6)
<u><em>Ответ: 6</em></u>
Объяснение:
Надо вместо переменной "х" подставлять заданные значения.
![f(x)=\frac{x-4}{x+3}\\\\f(-5)=\frac{-5-4}{-5+3}=\frac{-9}{-2}=4,5\\\\f(0)=\frac{0-4}{0+3}=-\frac{4}{3}=-1\frac{1}{3}\\\\f(7)=\frac{7-4}{7+3}=\frac{3}{10}=0,3\\\\f(u)=\frac{u-4}{u+3}](https://tex.z-dn.net/?f=f%28x%29%3D%5Cfrac%7Bx-4%7D%7Bx%2B3%7D%5C%5C%5C%5Cf%28-5%29%3D%5Cfrac%7B-5-4%7D%7B-5%2B3%7D%3D%5Cfrac%7B-9%7D%7B-2%7D%3D4%2C5%5C%5C%5C%5Cf%280%29%3D%5Cfrac%7B0-4%7D%7B0%2B3%7D%3D-%5Cfrac%7B4%7D%7B3%7D%3D-1%5Cfrac%7B1%7D%7B3%7D%5C%5C%5C%5Cf%287%29%3D%5Cfrac%7B7-4%7D%7B7%2B3%7D%3D%5Cfrac%7B3%7D%7B10%7D%3D0%2C3%5C%5C%5C%5Cf%28u%29%3D%5Cfrac%7Bu-4%7D%7Bu%2B3%7D)