Limit of a function

Question

Evaluate each of the following limits if it exists; =))?

1) Lim (3x^4 + 2x^2-x+2)                                      x→ -2
2) Lim (1 + 3x / 1 + 4x^2 + 3x^4)                           x→ 1
3) Lim x^2 + x – 6 / x - 2 ;                                      x→ 2
4) Lim x^2 – 9 / 2x^2 + 7x + 3                                x→ -3
5) Lim x+2 / x^3 + 8                                                x→ -2

Answer 1

evaluate 3x^4  +2x^2 -x +2 at x=-2

(-2)^4=+16 & 3*x^4=3*16=48

(-2)^2=4 & 2*x^2=8

-x=+2

sum=48+8+2+2=50+10

=60