VJesus12 Legendary Member View User Profile Posts: 2276 Joined: Sat Oct 14, 2017 6:10 am Followed by:3 members For non-zero integers \(a, b, c\) and \(d,\) is \(\dfrac{ab}{cd}\) positive? by VJesus12 » Wed Aug 26, 2020 3:41 am Timer 00:00 Your Answer A B C D E Global Stats For non-zero integers \(a, b, c\) and \(d,\) is \(\dfrac{ab}{cd}\) positive? (1) \(ad + bc = 0\) (2) \(abcd = -4\) Answer: D Source: Manhattan GMAT Top Quote
