Question

derivative of cot5x by first principle method​

Answer 1

Answer:

f(x)=x

2

First principle

lim

h→0 h/f(x+h)−f(x)

lim

h→0

h

(x+h)

2

−x

2

lim

h→0

h

x

2

+2xh+h

2

−x

2

lim

h→0

h

h(2x+h)

lim

h→0

2x+h=2x