Max

Ansc


@ashishdeosingh
Tell me where my working is wrong

can anyone tell me where I am wrong??

@ayush_nath isn't it am gm? Am gm can be used only for positive numbers

@potterhead i have used it for positive numbers only .given x>1 so x1/x>0

@ayush_nath
when you apply am gm to find range you need to see also whether that value is takable or not. the solution given by me is complete

@ashishdeosingh what do you mean by takeable?

@ayush_nath when u find x for the value which u hav found then x will be imaginary.
in ur case the max value will be attained when
(x1/x)^3=3(x1/x)=1
if u solve it then u get quadratic in x with negative discriminant. so the max value is not achieved by real x

@harshalpatil
finally got it ....thank you