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Find the derivative of f(x) = -12x2 + 9x at x = 6. a) -112.5 b)-135 c)90 d)108

Find the derivative of f(x) = -12x2 + 9x at x = 6. a) -112.5 b)-135 c)90 d)108
asked 170k views
5 votes
Find the derivative of f(x) = -12x2 + 9x at x = 6.

a) -112.5
b)-135
c)90
d)108

asked
User Guan
by
8.1k points

1 Answer

4 votes

hi

f(x) = -12x²+9x

So

f'(x) = -24x +9

if x = 6 then f'(6) = -24 (6) +9 = -135

answered
User Aneer Geek
by
8.7k points
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