SOLUTION: log_4(7x)=3

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Question 1204930: log_4(7x)=3
Found 2 solutions by MathLover1, ikleyn:
Answer by MathLover1(20850)   (Show Source): You can put this solution on YOUR website!

....change to base







Answer by ikleyn(52803)   (Show Source): You can put this solution on YOUR website!
.

They want you solve equation 

     = 3.


From this equation,

    7x =  = 4*4*4 = 64,

     x = .   


ANSWER.  x = .

Solved.

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To solve this problem, there is NO any need to change the base, as @MathLover1 does.

Is is an excessive operation, which actually is not needed.

Solving problems with excessive operations is NOT a good decoration. In opposite, it is a bad style.



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