SOLUTION: I need help with a natural log equation: 4ln x - ln 2 = ln 128 (I know the answer is 4, can you show me the steps) Thanks

Question 71142: I need help with a natural log equation:
4ln x - ln 2 = ln 128 (I know the answer is 4, can you show me the steps)
Thanks
Found 2 solutions by Earlsdon, stanbon:
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
Solve for x:
Apply the power rule to the first term:
Now apply the quotient rule for logarithms to the left side.
Remembering that Ifthen, you can write:
Multiply both sides by 2.
Take the 4th root of both sides.

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
4ln x - ln 2 = ln 128
lnx^4 - ln2 = ln128
ln(x^4/2) = ln128
x^4/2 = 128
x^4 = 256
x = 4
Cheers,
Stan H.
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