Ответ: A - 5 , B - 1 , C - 3 .
Объяснение:
А(3,66) , С(0,6) , .
5x^2*(-3*X^3)^2= -5x^2*9X^6=-45X^8
Х+5≥1-3х
х+3х≥1-5
4х≥-4
х≥-1
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-----------*-------------->x
-1
Ответ: х∈[-1; +∞)
f(x) = (x² - 2x - 3)²
f'(x) = 2(x² - 2x - 3)(2x - 2) = 4(x² - 2x - 3)(x - 1) = 4(x - 3)(x + 1)(x - 1)
f'(x) = 0 => 4(x - 3)(x + 1)(x - 1) = 0
x - 3 = 0 => x = 3
x + 1 = 0 => x = -1
x - 1 = 0 => x = 1
Ответ: x = 3, x = 1, x = -1.