dse doubt

[SoniaKapoor]

[Akshay Jain]

we can view 1st expression as an expression of left hand derivative and it is given that the function is differentiable in its domain so this must be true in general
the 2nd statement wil not hold valid in general.

[mrittik]

we can do it by 1st principal of limit ie f'(x)=lim h-0  f(x)-f(x-h)/x-(x-h)=f(x)-f(x-h)/h

for the second one f'(x)=lim h-0 f(x+2h)-f(x+h)/((x+2h-(x+h))=f(x)-f(x-h)/h

understood? @Akshay-boss plz check it & comment

[mrittik]

we can do it by 1st principal of limit ie f'(x)=lim h-0  f(x)-f(x-h)/x-(x-h)=f(x)-f(x-h)/h

for the second one f'(x)=lim h-0 f(x+2h)-f(x+h)/((x+2h-(x+h))= f(x+2h)-f(x+h)/h

[Akshay Jain]

yes mrittik i think ur way is correct.....great work...

[mrittik]

thanks Akshay....

[SoniaKapoor]

Thanx both of u