гюйс

Verified answer

1.
(-0,5а^-2 b^4)^-3= -8a^6 b^-12= - (8a^6)/(b^12)

(1/5 x^7 y^-6)^-4=625x^-28 y^24=(625y^24)/(x^28)

2.
1.4a^-6 c^7 * 2/7 a^5 c^-5=(a^5 c^7)/(a^6 c^5)=c²/a
при  а=0,4,  с= -0,1
(-0,1)²/0,4=0,02/0,4=0,025

(18x^5)/(y^-7) * (y^-4)/(15x^-2)=(18x^5 * x² * y^7) / (15y^4)=6/5 x^7 y³=1.2x^7y³

.
(8/a^-5 b^4)^-4 * (a^-7 b³/4)^-3=(8a^5/b^4)^-4 * (b³/4a^7)^-3=(b^4/8a^5)^4 * (4a^7/b³)³=(4³ a^21 b^16) / (4^6 a^20 b^9)=(a b^7)/64