Ответ:
1). f'(x) = -4sinx ;
f'(π/2) = -4*sin π/2 = -4; ответ : - 4
2). log(345) +log3(900)-log3(500) = log3(45*900/500) = log3(81) = 4 - ответ
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Ответ:
1). f'(x) = -4sinx ;
f'(π/2) = -4*sin π/2 = -4; ответ : - 4
2). log(345) +log3(900)-log3(500) = log3(45*900/500) = log3(81) = 4 - ответ