Ответ:
Объяснение:
(3a-4b)(3a+4b)
(c-b)(c+b)
(c+b)(c²-cb+b²)
(3a-1)(9a²+3a+1)
(x-3)/(x-3)²= 1/(x-3)
(x²-2x+4)/(x+2)(x²-2x+4)= 1/(x+2)
Y7 = 9 - 5•7 = 9 - 35 = -26
y8 = 9 - 5•8 = -31
y2k = 9 - 5•2k = 9 - 10k
y2k-1 = 9 - 5(2k - 1) = 9 - 10k + 5 = 14 - 10k.
-86 = 9 - 5n
-86 - 9 = -5n
n = 19.
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Готово!!Удачи))))
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23*2 sin 134*cos134/sin268=23*sin2*134/sin268=23*sin268/sin368=23
Ответ:23