Assume that f(x) is differentiable at x=a.state the equation of tangent line to the graph of f(x) at point (a,f(a))

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- October 11th 2006, 12:20 PMbobby77tangent line
Assume that f(x) is differentiable at x=a.state the equation of tangent line to the graph of f(x) at point (a,f(a))

- October 11th 2006, 12:25 PMtopsquark
- October 11th 2006, 01:15 PMThePerfectHacker
You can also use the formula,

If m is slope and (x_0,y_0) is point then equation is,

y-y_0=m(x-x_0)

Thus,

m=f'(a)

x_0=a

y_0=f(a)

Thus,

y=f'(a)x-f'(a)a+f(a)