Friday 29 December 2017

LOGARITHMS 10


If log5(2x + 19)=2; find x.

   Solution

Log5(2x + 19)=2

(2x + 19)=52           
                                            
2x + 19=25

2x = 25 – 19

2x = 6

2x =   6   
2        2

x = 3

Hence x = 3

TRY THIS………………


If log7(2t - 23)=2; find t

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