If ab > 0, which of the following must be negative? Choose one: A) a + b B) |a| + b C) b - a D) a/b E) -a/b
If ab &gt; 0 the we Infer that a and b both have same sign i.e. either both a and b are Positive or Both a and b are Negative   Now Checking Options:   (A) a + b will be positive for both a and b to be positive hence INCORRECT OPTION   (B) |a| + b will be positive for both a and b to be positive hence INCORRECT OPTION   (C) b - a May be positive for both a and b to be positive (e.g. b=3 and a=2) henceINCORR-a/bCT OPTION   (D) a/b will be positive for both a and b to be positive or Negative hence INCORR-a/bCT OPTION   (-a/b) -a/b will always be Negative because an and b have same sign so a/b will be positive therefore -a/b will be Negative hence CORR-a/bCT   Answer: Option -a/b
<result>E</result>
If ab > 0, which of the following must be negative?