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Line tangent to the curve 
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#1
Oct2608, 04:40 PM

P: 136

1. The problem statement, all variables and given/known data
For what values of a and b is the line 3x+y=b tangent to the curve y=ax^3 when x=5 ? 3. The attempt at a solution I believe i would need to find the equation of the tangent to y=ax^3 when x=5 then that should be equal to 3x+b=y if im not mistaken but im not sure what to do from here to solve for a and b. Any leads in the right direction or insight if this is the entirely wrong approach would be greatly appreciated! 


#2
Oct2608, 05:03 PM

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