If log(x+y/2) = 1/2(log x+log y) show that x=y
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Answer:
Log(x+y/2) = 1/2(log x+ log y)
x = y
log(
6
x+y
)=
2
1
(logx+logy)
⇒2log(
6
x+y
)=(logx+logy)
⇒log(
6
x+y
)
2
=(logx+logy)
⇒log(
6
x+y
)
2
=logxy
⇒(
6
x+y
)
2
=xy
⇒(x+y)
2
=36xy
⇒x
2
+y
2
+2xy=36xy
⇒x
2
+y
2
=34xy
⇒
xy
x
2
+y
2
=34
⇒
xy
x
2
+
xy
y
2
=34
⇒
y
x
+
x
y
=34
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