Saturday, 12 November 2016

LOGARITHMS 9


If log9(2x + 1)=2; find x.

   Solution

Log9(2x + 1)=2

(2x + 1)=92              
                                            
2x + 1=81

2x =81 – 1

2x = 80

2x =   80   
2        2

x = 40

Hence x = 40

TRY THIS………………


If log7(2t - 13)=2; find t

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