Question

Answer me both questions with explanation.
this questions is from third chapter of physics. Motion in the straight line.
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Answer 1

Answer:

Let P={-1,1} , Q={| 2 = 4, ∈ } and R = {-2,-1,1} . State which of the following are TRUE and which are FALSE. (i)P↔Q (ii)P=Q (iii)Q↔R (iv)P↔R (v)Q=R (vi)P=R