Posted by Anonymous on .
1. Write the given expression as a single logarithm.
log(70x)+log(10y)2
2. Write the given expression as a single logarithm.
ln7e/(square root 2x)ln(square root 2ex)
3. Write the given expression as a single logarithm.
2Ln(x)+Ln(4y)Ln(5z)

Precalculus 
Reiny,
1. log (70x/(10y))  2
= log (7x/y)  2
2. not clear if the √(2x) is part of the first ln or not.
3. 2lnx + ln(4y)  ln(5z)
= ln [ (x^2)(4y)/(5z) ]