Given that x2018 y2017 = 1/2 and x2016 y2019 = 8, the value of x2 + y3 is
If log2(5 + log3a) = 3 and log5(4a + 12 + log2b) = 3, then a + b is equal to
If p3 = q4 = r5 = s6, then the value of logs (pqr) is equal to
If (5.55)x = (0.555)y = 1000, then the value of 1/x - 1/y is