If , then the value of a is : 

If x is real then the minimum value of (x²-x-1) is :

If a^2x+2=1, where a is a positive real number other than 1, then x is equal to 

If x, y are two positive real number and  , then which of the following relations is true?

If a = 7, b = 5 and c = 3, then the value of is 

Two numbers x and y (x>y) such that their sum is equal to three times their difference. Then value of will be 

If and then the value of is.

If a+b=17,and a – b =9, then the value of is: