Carcass wrote:
If the reciprocal of the negative integer x is greater than the sum of y and z, then which of the following must be true?
(A) x>y+z
(B) y and z are positive.
(C) 1>x(y+z)
(D) 1<xy+xz
(E) 1x>z–y
Given that
1x>(y+z), where x<0
Multiplying 'x' both sides, (inequality sign to be flipped since x is negative)
x∗1x>x(y+z)Or,
1<xy+xzAns. (D)QS: can we write the reciprocal as -
1x and then proceed. please correct me if my thought process is wrong.
YES, IT'S WRONG. Suppose x = -5, reciprocal of x is
1x =
1(−5) = -
15; If you say, reciprocal of x is -
1x, then -
1x =
−1−5 =
15.