Wednesday, 8 April 2015

LOGARITHMS 7




If log7(3x + 19)=0; find x

   Solution

log7(3x + 19)=0

 (3x + 19)=70   
                      
 3x + 19=1


3x = 1 – 19

3x =  -18


3x =  -18   
3         3

x = -6


Hence x = -6

TRY THIS...............

If log2(3x - 28) = 5; find x

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