If 2^n-1+2^n+1=320 then n is equal to-

please tell me

ANS = 2n -1 +2n+1= 320

=> 2n  (2 -1 +21)= 320

=> 2n   (  1/2 + 2)  = 320

=> 2n  ( 5/2) = 320

=> 2n   = 320*2/5

=> 2n   = 27

thus, n = 7

  • 7

ANS = 2n -1 +2n+1= 320

=> 2n ( 2 -1 +21)= 320

=> 2n ( 1/2 + 2) = 320

=> 2n ( 5/2) = 320

=> 2n = 320*2/5

 

=> 2n = 27

thus, n = 7

  • 2

ANS = 2n-1+2n+1= 320

= 2n(2-1+21)= 320

= 2n(1/2 + 2)= 320

= 2n(5/2)= 320

= 2n= 320*2/5

= 2n= 27

thus, n = 7

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