Posted by Shelly on .
f(x)=8/(x^2+x+2)
Set up an equation, which when solved will give the points where the tangent line has yintercept 5.

calculus 
Damon,
f' = a = 8(2x+1)/(x^2+x+2)^2
y = a x + 5
8/(x^2+x+2) = 8(2x^2+x)/ (x^2+x+2)^2 + 5
etc 
calculus 
Shelly,
Damon, so what you did was apply the quotient rule to the ax part? Wouldn't the 8 be 8x then? And if I'm doing it right, would my final equation be this?
0=(5x^4+10x^3+x^2+4x+4)/(x^2+x+2)^2