1. Find the following limit without using a graphing calculator or making a table.
lim
x → 3
x2 - 9
x - 3
NO. 13 If
f(x) = 7x2 - 4x,
find
f '(2)
and use it to find an equation of the tangent line to the parabola
y = 7x2 - 4x
at the point (2, 20).
f '(2)
=
y(x)
=