Posted by **Blue** on Thursday, September 29, 2011 at 4:40pm.

log4x^4 + log4^2 = 3

Solve the logarithmic equation.

- Math -
**Steve**, Thursday, September 29, 2011 at 5:44pm
log4x^4 = log4 + 4logx

log4^2 = 2log4

log4 + 4logx + 2log4 = 3

3log4 + 4logx = 3

4logx = 3(1-log4)

Now, if we're dealing with base 10, 1 = log10, so 1-log4 = log(10/4) = log(5/2)

4 logx = 3log(5/2)

logx = 3/4 log(5/2)

x = 10^(3/4) * l0^(log 5/2)

x = 10^3/4 * 5/2

x = 5/2 10^(3/4)

x = 5/2 ∜1000

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