Question

What is the difference b/w dy and delt y??

Answer 1

yes

Answer 2

dy is the limit of delta-y as it approaches zero.

Answer 3

When we have to find change in function, we"ll find dy or delta-y?

Answer 4

Depends on how much change you're looking for. Delta-y is measurable and has a definite value. dy is infinitesimal and is effectively zero - so you can add dy to something and not change it, but you can also divide by it without technically dividing by zero.
delta-y/delta-x is an average rate of change (a slope), dy/dx is an instantaneous rate of change (slope of a tangent line.

Answer 5

thank u v v much..:P