Question

ПОМОГИТЕ ПЛЗ ДАМ 30 БАЛЛОВ!!!! ​

Answer 1

Ответ:

$1)\ \ \displaystyle \frac{a^{20}\cdot a^{20}}{a^{17}\cdot a^{19}}=\frac{a^{40}}{a^{36}}=a^4\\\\a=5:\ \ \ \ a^4=5^4=625\\\\a=-\frac{3}{11}:\ \ \ a^4=\frac{3^4}{11^4}=\dfrac{81}{14641}\\\\a=2,8:\ \ \ \ a^4=2,8^4=61,4656\\\\a=-40:\ \ \ \ a^4=(-40)^4=2560000\\\\\\2)\ \ \frac{b^{40}\cdot b^{10}\cdot b^{38}}{b^{37}\cdot b^{49}}=\frac{b^{88}}{b^{86}}=b^2\\\\b=8:\ \ \ \ b^2=8^2=62\\\\b=-1,3:\ \ \ \ b^2=(-1,3)^2=1,69\\\\b=\frac{5}{3}:\ \ \ \ b^2=\frac{25}{9}\\\\b=-6:\ \ \ \ b^2=(-6)^2=36$