2x x 81/5 = 21/5, then x is equal to:
1/5
-1/5
2/5
-2/5
Correct Answer : D
If logX (9/16)= -(1/2), then x is equal to
(log5 3)X(log3 625) equals
If log8 (X2+X)-log5(x+1)=2, then the value of x is