Thursday, 22 February 2018

LOGARITHMS 11


If log3(10x + 21)=4; find x.

Solution

log3(10x + 21)=4

 (10x + 21)=34      
                                            
 10x + 21=81

10x = 81 – 21

10x =  60

10x606   
10      10

x = 6

Hence x = 6

TRY THIS…………….


If log2(5x + 2)=6; find x

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