Given 2 integers a and b, if a is negative and b is positive, which of the following options must be positive?
Answers:	A) ab	B) a/b	C) 4a/b	D) (a + b)^4	E) 2ab
A.ab   -ve*+ve= -ve   will be negative   B. a/b   -ve/+ve=-ve   will be negative   C. 4a/b   -ve/+ve=-ve   D. (a + b)^4   = (a + b)^4 will be positive irrespective of the absolute values of x and y   will be positive always   E. 2ab   -ve*+ve= -ve   will be negative   Answer (a + b)^4
<result>D</result>
Given 2 integers a and b, if a is negative and b is positive, which of the following options must be positive?