Question Bank - Mathematics

Here's the question bank on all the mathematics topics.

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If we denote (ab - 1)2 by a ? b, then (1 ? 2) ? (1 ? 2) =

A.
32
B.
64
C.
0
D.
70

Solution:

We have,(ab - 1)2 = a ? bHence,(1 ? 2) = ((1 ? 2) - 1)2 = 1? (1 ? 2) ? (1 ? 2) = 1 ? 1Hence, (1 ? 1) = (1 - 1)2 = 0

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