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c1-t2-7

c1-t2-7 - This is based on a partially correct solution...

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NAME: Em Toidi [Briefs] TEST2/MAC2311 Page 1 of 4 ______________________________________________________________________ Read Me First: Show all essential work very neatly. Use correct notation when presenting your computations and arguments. Write using complete sentences. Communicate. Show me all the magic on the page. Eschew obfuscation. ______________________________________________________________________ ______________________________________________________________________ 7. (10 pts.) Find the x-coordinates of all points on the graph of at which the tangent line passes through the point (2,0). Here is a second solution to this problem. This is based on a
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Unformatted text preview: This is based on a partially correct solution provided by a student. Instead of first obtaining an equation for the tangent line to the curve at an arbitrary point x on the real line, we will obtain an equation for the line throught the point (2,0) with slope provided by that of the tangent line at any point ( x , f ( x )) on the curve Plainly, this is given by , or in slope-intercept form, , after routine algebra. Since the line defined by this equation also contains the point ( x , f ( x )), we must have . Consequently, as in the first solution, Thus,...
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