If log	(a/b)+log(b/a)	= log (a + b), then:
Choose one.
A) a=b	B) a+b=0	C) a-b=1	D) a+b=1	E) a-b = 0
log(a/b)+ log(b/a)	= log (a + b)   log (a + b) = log{(a/b)x(b/a)}	= log 1.   So, a + b = 1.   Answer is a+b=1
<result>D</result>
If log	(a/b)+log(b/a)	= log (a + b), then: