Question
7.
If x=log, (156+156+156+156+.....), then which of the following statements ho
(A) x <0
B) 0

7.
If x=log, (156+156+156+156+.....), then which of the following statements ho
(A) x <0
B) 0
Solution
( x=log _{2} sqrt{56+sqrt{56+sqrt{56}-}} )
3 ( 2^{x}=sqrt{5 b+sqrt{5 b+sqrt{56+cdots}}} )
( partial^{x}=sqrt{5 b+left(2^{x}right)} )
S ( left(Q^{x}right)^{2}=5 b+2^{x} )
( -12left(2^{x}right)^{2}-2^{x}-56=0 )
& ( left(2^{x}right)^{2}-8left(2^{x}right)+7left(2^{x}right)-56=0 )
& ( 2^{x}left(2^{x}-8right)+7left(2^{x}-8right)=0 )
( therefore quad 2^{x}=-7 quad x )
( int_{theta}^{2^{x}=8}{2 x^{2}=3} )
Solution
