Question

Can Someone help me with these??
PLEASE
Find the intervals on which the function is continuous.
1) y =
4
5x - 2
2) y = x2 - 6
Find numbers a and b, or k, so that f is continuous at every point.
3)
f(x) =
x2,
x + k,
if x K 4
if x > 4
Find an equation for the line tangent to the graph of the given function at the indicated point.
4) f(x) =
x3
2
at (-2, - 4)
5) f(x) = x - x2 at (-4, -20)
Find the derivative.
6) f(x) = 3x4 - 9x3 + 5
7) y =
6
x5
8) f(x) =
4
x
-
3
x +
9
x4
For the given function, find the points on the graph at which the tangent line has slope 1.
9)