Hi,

Differentiate using first principles:

y = 2x^-2 + 3x^-1

I keep getting bogged down at the point:

1/(2x^2 + 4xh + 2h^2) + 1/(3x + 3h)

as I have to subtract (2x^-2 + 3x^-1) from the above.

If anyone could help i would greatly appreciate it.

Thanks