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Topic: [ap-calculus] larson pg 137 exercise 69
Replies: 2   Last Post: Oct 17, 2012 12:44 PM

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Dwayne Wellington

Posts: 6
Registered: 9/13/12
[ap-calculus] larson pg 137 exercise 69
Posted: Oct 17, 2012 9:29 AM
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Good morning, I was working on exercise 69 from Larson early Transcendentals and am missing the key to answering the question.

Find the value of k such that the line is tangent to the graph of the function.

(function) f(x) = x^2 - kx (line) y = 5x -4

the answers are x= -1, -9 but I can't seem to get that when I work out the problem. Thank you for the assistance in advance.
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