i need some serious help with limits in pre-calc.

Question

here are a few questions that i really do not understand.

1. Evaluate: lim (3x^3-2x^2+5) x--> -1

2. Evaluate: lim [ln(4x+1) x-->2

3. Evaluate: lim[cos(pi x/3)] x-->2

4. Evaluate: lim x^2+x-6/x^2-9 x--> -3

5. Evaluate: lim x^2-5x+4/x^2-2x-8 x->4

6. For the function x^2+2x+4 find lim f(h+4)-f(4)/h h--> 0

Answer 1

Seizing the means of production