Question

Given f(x) = 5 x^2 - 15 x + ( -2 ) , at which point will the curve have slope
(a) 0
(b) 2
(c) - 2

All the answers MUST be points.
(a) The point where the slope is 0 is .
(b) The point where the slope is 2 is .
(c) The point where the slope is - 2 is .

Answer 1

i think this is right

Answer 2

Juanita, I think they meant the slope was those values, not x..

Answer 3

dy/dx = 10x-15

gradient= 0, dy/dx= 0
10x-15=0
x=1.5 when x=1.5, f(1.5)= 5(1.5)^2 -15(1.5)-2= -13.25
(1.5, -13.25)

dy/dx = 2,
10x-15=2
x=1.7 f(1.7)= -13.05 (1.7,-13.05)

dy/dx=-2
10x-15=-2
x=1.3 f(1.3)=-13.05 (1.3,-13.05)

Answer 4

acekly was correct

Answer 5

thanks

Answer 6

:D