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If A={x<x is a natural number,x<5 and ...

If `A={x `x>7`},then `n(A)` is

A

1

B

0

C

2

D

3

Text Solution

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The correct Answer is:
B
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Knowledge Check

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    A
    21N
    B
    10 N
    C
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    D
    None of these

  • If (dx)/(x^(2)(x^(n)+1)^((n-1)//n))=-[f(x)]^(1//n)+c , then f(x) is

    A
    a)`(1+x^(n))`
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    b) `1+x^(-n)`
    C
    c) `x^(n)+x^(-n)`
    D
    d) None of these

  • If |x^(2) - 7|le 9 , then x in

    A
    `[-4, 4]`
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    `[4, oo)`
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