16=2^4, 8=2^3, 4=2^2, 2=2^1, 1=2^0. ВСЕ )))
ЖЕДАЛЙАШОВАПРЫГНРМ ВППЦКП
Объяснение:
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Нужно заучить таблицу квадратов, хотя бы до 20^2 = 400, и извлекать корни.
1) √(16*25) = √16*√25 = 4*5 =. 20
2) √216 = √(36*6) = 6√6
3) 2√14 = √(2^2*14) = √(4*14) = √56
4) 6+ 4√2 = 4+ 4√2+ 2. = 2^2+ 2*2*√2+ (√2)^2 = (2+ √2)^2
5) 26 -15√3 = 8 +18 - 12√3 -3√3 = 2^3 - 3*2^2*√3 + 3*2*(√3)^2 - (√3)^3 = (2-√3)^3
6) (√2-1)*√(3-2√2) + 2√2 = (√2-1)*√(2-2√2+1) + 2√2 = (√2-1)*√(√2-1)^2 + 2√2 =
= (√2-1)(√2-1) + 2√2 = 2-2√2+1+2√2 = 3
7) 12/(3√2) = 6/√2 = 6*√2/(√2)^2 = 6√2/2 = 3√2
8) 4/(3-√15) + 4/(3+√15) = 4(3+√15)/(9-15) + 4(3-√15)/(9-15)=
= (12+4√15+12-4√15)/(-6) = 24/(-6) = -4
16 = 2⁴
8 = 2³
4 = 2²
2 = 2¹
1 = 2⁰