## Abhishek Khurana is teaching live on Unacademy Plus

Abhishek Khurana B.Com (Honours) from Panjab University MBA in Marketing from NMIMS 2009-2011 Plus Educator on Unacademy 8 years teaching experience 6 times 99 percentiler in CAT

Logarithms

Course structure All types of questions included Easy, Medium & Difficult Useful for CAT, XAT, IIFT, NMAT, SNAP GRE, GMAT Bank PO, SSC & all other Government jobs

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Miscellaneous Examples Example 11. If log 2v1o(x2- 6x + 45) - 2, then which of the following is the value of x b. 5 C 2 d Both (1) and (2)

Miscellaneous Examples Example 11. If log 2v1o(x2- 6x + 45) - 2, then which of the following is the value of x b. 5 C 2 d Both (1) and (2) Solution: log 2ho(x2-6x + 45) 2 log 210(X2-6x + 45) =2 log 2v10 2V10 = log 2v1o (2-10)? (x2-6x + 45)=40 (x2 - 6x + 5)-0 x= 1 or 5

Miscellaneous Examples Example 12. If log2(log,(log2(x2 + 4x + 4))) = 1, then find the positive value of X.

Miscellaneous Examples Example 12. If log2(log,(log2(x2 + 4x + 4))) = 1, then find the positive value of X. Solution: log(log4(log(x2 + 4x + 4))) = 1 (loga(loga(x2+ 4x + 4))-2 (log2(x2+ 4x + 4))-16 (x2 + 4x + 4)=216 (x+2)2 21 x+2-28 x=28-2

Miscellaneous Examples Example 13. Find the value of logb (2x y)logx x log,y x log, b

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