WBJEE 2019 Math Solved Paper

© examsiri.com

Question : 60 of 75

Marks: +1, -0

Let f : X → Y and A, B are non-void subsets of Y, then (where the symbols have their usual interpretation)

f–1 (A) – f–1 ⊃ f–1 (A – B) but the opposite does not hold
f–1 (A) – f–1(B) ⊂ f–1 (A – B) but the opposite does not hold
f–1 (A – B) = f–1 (A) – f–1 (B)
f–1 (A – B) = f–1 (A) ∪ f–1 (B)

Go to Question:

Prev Question

Next Question