If 2^x – 2^x-1=4 then the value of x^x is

  1. 4
  2. 1
  3. 256
  4. 27
Monis Rasool Professor Asked on 14th November 2015 in Maths.
Add Comment
1 Answer(s)

Answer: (4) 27 

Explanation:-
2^x – 2^x  – 1 = 4
2^x (1 – 1/2) = 4
2^x /2 = 4
2^x = 4 x 2 
2^x = 2^3
Compared the equation,
x = 3
Then, the value of x^x = 3^3
 = 3 x 3 x 3
 = 27

Then, the value of x^x  is 27.

Hence, the answer is (4) 27. 

Anurag Mishra Professor Answered on 14th November 2015.
Add Comment

Your Answer

By posting your answer, you agree to the privacy policy and terms of service.