If dy/dx=0,(adsbygoogle = window.adsbygoogle || []).push({});

for all x in the function y= f(x)'s domain,then

how can we say... only by using limits, that the function is a constant one?

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Dy/dx = 0

**Physics Forums | Science Articles, Homework Help, Discussion**