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- April 5th 2009, 04:26 PM #1

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- April 5th 2009, 04:34 PM #2

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- April 5th 2009, 04:34 PM #3
.

The derivative of the left hand side is . Use the product rule to differentiate the right hand side.

Substitute and (why?) and solve for the value of .

You now have the gradient of the tangent and you know a point on the tangent. Getting the equation of the tangent should be routine.

- April 5th 2009, 04:37 PM #4

- April 5th 2009, 05:04 PM #5

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- April 5th 2009, 05:38 PM #6