Question

Помогите, пожалуйста

Answer 1

(7a^4/7)/a^37*(a^8/7-3)=7a(1/7)/(a^8/7-3)=7*2/(256-3)=14/253

Answer 2

$128=2^7 \ \ frac{7a^{ frac{4}{7} }}{a^{ frac{11}{7} }+3a^{ frac{3}{7} }}= frac{7*(2^7)^{ frac{4}{7} }}{(2^7)^{ frac{11}{7} }+3*(2^7)^{ frac{3}{7} }}= frac{7*2^4}{2^{11}+3*2^3}= \ \ = frac{7*2^4}{2^3(2^{8}+3)}= frac{7*2}{2^{8}+3}= frac{14}{256+3}= frac{14}{259}$