Saturday, 17 January 2015

LOGARITHMS 14




If log3(4x + 7)=3; find x.

Solution

log3(4x + 7)=3

 (4x + 7)=33   
                      
 4x + 7=27

4x = 27 – 7

4x =  20

4x =  20   
4        4

x = 5

Hence x = 5

TRY THIS…………….

If log3(4x + 1)=4; find x

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