Question

(y^4)^5:(y^9)^2*y^3 при у=-1

(z^3)^9:(z^4)^6*a при z=-2

Решите позязя:3

N 4.12

Answer 1

$\displaystyle \tt 4.12\\\\1). \ \ (y^{4})^{5}:(y^{9})^{2}\cdot y^{3}=y^{20}:y^{18}\cdot y^{3}=y^{20-18+3}=y^{5}\\\\.\ \ \ \ \ npu \ \ y=-1: \ \ \ \ \ \ y^{5}=(-1)^{5}=-1\\\\2). \ \ (z^{3})^{9}:(z^{4})^{6}\cdot z=z^{27}:z^{24}\cdot z=z^{27-24+1}=z^{4}\\\\. \ \ \ \ \ npu \ \ z=-2: \ \ \ \ \ \ z^{4}=(-2)^{4}=16;$