SOLUTION: log 18+1/2 log25 -2 log 3=1

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: log 18+1/2 log25 -2 log 3=1      Log On


   

Question 957803: log 18+1/2 log25 -2 log 3=1
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
There are no variables, so this equation is
an "identity' which means it must always be true
You have to prove it is always true
+log%28%28+18+%29%29+%2B+%281%2F2%29%2Alog%28%28+25+%29%29+-+2%2Alog%28%28+3+%29%29+=+1+


+log%28%28+18+%29%29+%2B+log%28%28+5+%29%29+-+2%2Alog%28%28+3+%29%29+=+log%28%28+10+%29%29+
+log%28%28+18%2A5+%29%29+-+log%28%28+3%5E2+%29%29+=+log%28%28+10+%29%29+
+log%28%28+90+%29%29+-+log%28%28+9+%29%29+=+log%28%28+10+%29%29+
+log%28%28+90%2F9+%29%29+=+log%28%28+10+%29%29+
+log%28%28+10+%29%29+=+log%28%28+10+%29%29+
+1+=+1+
OK