camk4420
07.09.2019 •
Mathematics
Which of these is a tangent line to y= -x^2 at x=4
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Ответ:
Step-by-step explanation:
an equation of this tangent is : y = f'(4)(x-a)+f(4)
a = f'(4)
f(x) = - x²
a=4
f'(x) = -2x
f'(4) = -2(4) = -8
f(4) = -(4)² = -16
so : y = - 8 (x-4)-16
y = - 8x +16
Ответ:
1. 20-5x > -10
2. x < 6
Step-by-step explanation: