J joey123 New member Joined Oct 23, 2005 Messages 29 Oct 23, 2005 #1 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.
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 Elite Member Joined Jan 29, 2005 Messages 11,978 Oct 23, 2005 #2 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.
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.
J joey123 New member Joined Oct 23, 2005 Messages 29 Oct 23, 2005 #3 but.. given the info, how do i find the values for a and b?
J joey123 New member Joined Oct 23, 2005 Messages 29 Oct 23, 2005 #4 got it nvm, i got it, thanks for the help
