The limit of z3{r2 + vrt +1- zv2} as r oo 1 (b) exists and equals (a) exists and equals (d) exists and equals 2 4 (c) does not exist;

The limit of z3{r2 + Vrt +1- zV2} as r oo 1 (B) exists and equals (A) exists and equals (D) exists and equals 2 4 (C) does not exist;