" ii."quad (1)/(8a^(3))+(8)/(b^(3))

Factorise : (1)/(8a^(3))+(8)/(b^(3))

Factorise : (i) 9a^(3)-27b^(3) " " (ii) a^(3)-343 " " (iii) a^(3)-(27)/(a^(3)) " " (iv) 1+8a^(3) " " (v) (a+b)^(3)-(a-b)^(3) .

If a , b , c are real and positive , prove that the inequality (1)/(a)+(1)/(b)+(1)/( c) lt (a^8+b^8+c^8)/(a^3b^3c^3) .

Simplify ( i ) (((1)/(3))^(-2)-((1)/(2))^(-3)}-:((1)/(4))^(-2)*( ii) ((5)/(8))^(-7)xx((8)/(5))^(-5)

Factorise : (8a^(3))/(27) - (b^(3))/(8)

If 2x - (1)/(2x) =4 , find : (ii) 8x^(3) - (1)/( 8x^3)

Evaluate {((1)/(3))^(-1)-((1)/(4))^(-1)}^(-1) (ii) ((5)/(8))^(-7)xx((8)/(5))^(-4)

8a^(3)-27b^(3)-1-18ab