Question

Помогите пожалуйста номер 1 буква г

Answer 1

$1)\frac{0,3}{2^{-2}+5^{-2}}=\frac{0,3}{\frac{1}{4}+\frac{1}{25}}=\frac{0,3}{0,25+0,04}=\frac{0,3}{0,29}=\frac{30}{29} =1\frac{1}{29}$

$2)(2\frac{1}{14})^{-2}-(1\frac{14}{15})^{-2}=(\frac{14}{29})^{2}-(\frac{15}{29})^{2}=\frac{14^{2}-15^{2}}{29^{2}}=\frac{196-225}{29^{2}}=-\frac{29}{29^{2}}=-\frac{1}{29}$

$3)1\frac{1}{29}+(-\frac{1}{29})=1\frac{1}{29}-\frac{1}{29}=1\\\\Otvet:\boxed{1}$