Download the app

Questions  

If log102,log102x1 and log102x+3 are three consecutive terms of an A.P. for

 

Remember concepts with our Masterclasses.

80k Users
60 mins Expert Faculty Ask Questions
a
no real x
b
exactly one real x
c
exactly two real x
d
more than two real x

Ready to Test Your Skills?

Check Your Performance Today with our Free Mock Tests used by Toppers!

detailed solution

Correct option is A

2,2x−1,2x+3 are in G.P.⇒2x−12=22x+3⇒22x−22x+1=22x+6⇒22x−42x−5=0⇒2x−5(2x+1)=0⇒2x=5 ∵2x+1>0Thus, there is exactly one value of x.


Similar Questions

If log2(5.2x+1),log4(21x+1)and 1 are in A.P, then x is equal to


whats app icon
phone icon