Cpt - qa qstn ... plz help

CPT 755 views 2 replies

Student CA- Final CS- Executive

169 Points Joined June 2011

given that:

log 2 X (ie log x to the base 2) + log 4 X +log 16 X = 21/4 then x =??

answr as per icai module is 8 bt i dont know how to solve...

Replies (2)

The Easy are never Good and the Good are

4957 Points Joined January 2012

You know the formula, Log _an p^m= m/n log_ap

Applying the formula,

Log₂x + 1/2 Log₂x + 1/4 Log₂x = 21/4

Taking Log₂x common,

(1 + 1/2 + 1/4) Log₂x = 21/4

(7/4) Log₂x = 21/4

Log₂x = 3

X =2³ = 8

Guest

Applying the formula,

Log2x + 1/2 Log2x + 1/4

Log2x = 21/4

Taking Log2x common, (1 + 1/2 + 1/4) Log2x = 21/4 (7/4)

Log2x = 21/4

Log2x = 3 X =23 = 8

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