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MHT CET 2018 Math Solved Paper
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© examsnet.com
Question : 39
Total: 50
If X = {
4
n
- 3n - 1 : n ∊ N} and Y = {9n - 1: n ∊ N}, then X ∩ Y =
X
Y
ϕ
{0}
Validate
Solution:
(a) X =
4
n
- 3n - 1 n ∊ N
& Y = 9(n - 1) n ∊ N
⇒ X= {0, 9, 54, 243, ......}
& Y = { 0, 9, 18, 27, 36, 45, 54,.....}
∴ X ∩ Y = X
© examsnet.com
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