Question

If A = {x : x € N, and x2 < 30), then n(A) = ?
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Answer 1

Answer:

the answer is

7

Step-by-step explanation:

7 is the answer

Answer 2

If A = { x : x ∈ N and x² < 30 } then n(A) = 5

Given :

The set A = { x : x ∈ N and x² < 30 }

To find :

The value of n(A)

Solution :

Step 1 of 3 :

Write down the given set

The given set is

A = { x : x ∈ N and x² < 30 }

Step 2 of 3 :

Find the elements of A

The elements of A are 1 , 2 , 3 , 4 , . . . .

1² = 1 < 30

2² = 4 < 30

3² = 9 < 30

4² = 16 < 30

5² = 25 < 30

6² = 36 > 30

So A = { 1 , 2 , 3 , 4 , 5 }

Step 3 of 3 :

Find the value of n(A)

The value of n(A)

= The number of elements in A

= 5

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