1. ## [SOLVED] Complex

Need help on this question.

Evaluate the following limits:

1. $\underset{z\to -i}{\mathop{\lim }}\,\frac{{{z}^{4}}}{{{z}^{3}}+i}.$

2. $\underset{z\to \infty }{\mathop{\lim }}\,\frac{{{(z-2i)}^{2}}(7z-3)}{{{(1-iz)}^{2}}(1+5z)}.$

3. $\underset{z\to i+1}{\mathop{\lim }}\,\frac{{{z}^{5}}}{{{z}^{2}}-2i}.$

2. I have solved this sorry.