Ответ:
Объяснение:
b₇=b₁⋅
qⁿ⁻¹=18⋅(
1/9)⁶=9⋅
2⋅
1/9⁶=2/9⁵=2/59049
b₅=64⋅
(1/4)⁴=4³⋅
1/4⁴=1/4=0,25
b₈=4⋅
(-1/2)⁷=2²⋅
(-1)/2⁷=-1/2⁵=-1/32
b₉=-625⋅
(-1/5)⁸=-5⁴⋅
1/5⁸=-1/5⁴=-1/625
А) (m+n) ( - m + n ) = -m²+nm-mn+n²=n²-m²
<span>б) (- a - 2b) ( a-2b) = -a</span>²+2ab-2ab+4b²=4b²-a²
F '(x)=(3x^2+2x+1)(x+1)+(x^3+x^2+x+1)