=a^7 *a^-10=a^(7-10)=a^(-3)=(1/5)^(-3)=5^3=125
Ответ:
Объяснение:
x³+6x²+12x+8-x³-6x²-9x-23=0
3x=15
x=5
Решение
<span>a) 30</span>°<span> = (</span>π*30)/180 = π/6
<span> б) 45</span>°<span> = (</span>π*45)/180 = π/4<span>
в)120</span>°<span> = (</span>π*120)/180 = 2π/3<span>
г) 90</span>°<span> = (</span>π*90)/180 = π/2<span>
д) 240</span>°<span> = (</span>π*240)/180 = 4π/3