Remark
I didn't know this was a calculus question. How dumb of me.
f(x + h) - f(x)
==========
x + h - h
50/6 - 51/6 =( -1/6+ h)/h
The h's will disappear when the limit is taken.
answer - 1/6 which is A. If anyone else answers take their answer.
Idk but the web always helps me so you can ask that question online
Answer:
Step-by-step explanation:

768
3x4= 12
12x4= 48
48x4= 192
192x4=768