Prove that the function 
is strictly increasing on ]0, ∞[.
f(x)=ln(x)
for x<0
f’(x)=-ve →increasing
for x>0
f’(x)=+ve →decreasing
f(x) in increasing when x>0 i.e x∈(0,∞ )
1
Prove that the function is strictly increasing on ]0, ∞[.
f(x)=ln(x)
for x<0
f’(x)=-ve →increasing
for x>0
f’(x)=+ve →decreasing
f(x) in increasing when x>0 i.e x∈(0,∞ )