Problem

[joey123]

I'm having trouble with a problem. Its says to find the values of a and b if the tangent to y=ax^2+bx at (1,5) has a slope fo 8. Please help me.

 

[pka]

If you know that y=f(x)=ax<SUP>2</SUP>+bx and (1,5) is on the graph then 5= a(1)<SUP>2</SUP>+b(1).
Moreover, the slope f’(1)=8.

 

[joey123]

but..

given the info, how do i find the values for a and b?

 

[joey123]

got it

nvm, i got it, thanks for the help