For any numbers a and b, a#b = ab(4 − b). If a and a#b both represent positive numbers, which of the following could be a value of b?  Pick
A) 3.2.1  B) 4  C) 5  D) 6  E) 7
a#b positive then b may be positive or negative. if positive then b&lt; 4 may be 3,2 or 1 and if negative then it is more than or equal to -negative . ab will be -ve which is not possible as a and a#b should be positive.   ans 3,2 and 1   3.2.1
<result>A</result>
For any numbers a and b, a#b = ab(4 − b). If a and a#b both represent positive numbers, which of the following could be a value of b?