Thank You, just wondering if thats the full solution or do i continue getting the limit, i am unsure how to continue getting the limit.
Use the Newton's Bynomial Theorem, $\displaystyle (z+h)^6=z^6+6z^5h+\ldots+h^6$ , cancel $\displaystyle z^6$ and divide numarator and denominator by $\displaystyle h$ .