Write the equation of the line that’s tangent to the given function at x=1 f(x)= two x to the third power minus four x
1 answer:
take the derivitive to find the slope
so at x=1, the slope is f'(1)=6(1)^2-4=6-4=2
y=mx+b
y=2x+b
find b
at x=1, f(1)=2(1)^3-4(1)=2-4=-2=y
-2=2(1)+b
-2=2+b
-4=b
equation is y=2x-4
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