Recent content by mathiscool

Thanks! I got x=-4 for part c and now I'm down to part D. I think I'm supposed to set the original equal to the equation and solve in terms of a, but from that I'm getting a value for a. Do i plug that value, along with x=-1 into the original to find the area?

Homework Statement Let f(x)= a (7-x^2) for all a does not equal 0 a) Find, in terms of a, the equations of the lines tangent to these curves at x=-1 b) Find, in terms of a, the y-intercepts of the tangent lines at x=-1 c) find the x-intercepts of the tangent lines at x=-1 d)find, in terms...