" 56.The value of "((256x^(16))/(81y^(4)))^(-(1)/(4))" is "

((16)/(81))^((-3)/(4)) is equal to

Factorise : (x^(4))/(16)-(y^(4))/(81)

The value of sqrt(sqrt(256)+sqrt(81)) is :

Factorise : 64x^(4)+81y^(4)

If x=-2 and y=1, by using an identity find the value: (4y^(2)-9x^(2))(16y^(4)+36x^(2)y^(2)+81x^(4))

Let 1 le x le 256 and M be the maximum value of (log_(2)x)^(4)+16(log_(2)x)^(2)log_(2)((16)/(x)) . The sum of the digits of M is :

Let 1 le x le 256 and M be the maximum value of (log_(2)x)^(4)+16(log_(2)x)^(2)log_(2)((16)/(x)) . The sum of the digits of M is :