Let={2,4,7},B={2,5,4} find the set A∆B
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Solution:
A △ B = (A – B) ∪ (B – A)
Given A={2,4,7},B={2,5,4}
A - B = {7}
B - A = {5}
Now, A △ B = (A – B) ∪ (B – A)
= {7} ∪ {5}
= {5,7}