If a ≠ b, then which of the following statement is true ?

What is the compound interest on a sum of ₹25,000 after three years at a rate of 12 per cent per annum interest compounded yearly?  

 if , then what is the value of (2a+3b)?

if a=26 and b=22, then the value of   is

If   then the value of n is : 

 If 3x²-5x+1=0, then the value of ( ) is 

If a = 2·361, b = 3·263 and c = 5·624, then the value of a³ + b³ – c³ + 3abc is

If (x + 6y) = 8, and xy = 2, where x > O, what is the value of (x³+216y³)?