Posted by Roger on Monday, January 7, 2013 at 11:00pm.
solve the equation
loga(x5) loga (x+9)=loga(x7)loga(x+9)
all a's are lower
please show work

math/calculus  Steve, Tuesday, January 8, 2013 at 12:24am
collect logs
log((x5)/(x+9)) = log((x7)/(x+9))
(x5)/(x+9) = (x7)/(x9)
assuming x ≠ 9,
x5 = x7
5 = 7
no solution  typo?
even easier, add log(x+9) to both sides to get
log(x5) = log(x7)
x5 = x7
no solution

math/calculus  DRmT3DkwpBEe, Saturday, October 3, 2015 at 3:10am
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