Wednesday 28 December 2016

LOGARITHMS 15


If log9(2x + 19)=2; find x.

   Solution

Log9(2x + 19)=2

(2x + 19)=92           
                                            
2x + 19=81

2x =81 – 19

2x = 62

2x =   62   
2        2

x = 31

Hence x = 31

TRY THIS………………


If log7(2t - 25)=2; find t 

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