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anonymous
 4 years ago
Find the slope of the tangent using f(fx+h)  f(x) /h
y= x^3 at x =2
anonymous
 4 years ago
Find the slope of the tangent using f(fx+h)  f(x) /h y= x^3 at x =2

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TuringTest
 4 years ago
Best ResponseYou've already chosen the best response.1just plug into the formula and multiply out the cubic\[\frac{f(x+h)f(x)}h=\frac{(x+h)^3x^3}h=\frac{x^3+3x^2h+3xh^2+h^3x^3}h\]\[=\frac{3x^2h+3xh^2+h^3}h=3x^2+3xh+h^2\]now you can take the limit as h approaches zero
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