NDA Government Jobs Exams

What is the value of logy x^5 logx y^2 logz z^3 ?

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NDA Other Question

If A = {x, y}, B = {2, 3}, C = {3, 4}, then what is the number of elements in A × (B ∪ C) ? If A is a relation on a set R, then which one of the following is correct ?
(a) R ⊆ A (b) A ⊆ R (c) A ⊆ (R ×R) (d) R ⊆ (A×A)