यदि \(A={x\in \mathbb{Z}:x^2-9<0}\) है, तो (A) में कितने अवयव हैं?

If \(A={x\in \mathbb{Z}:x^2-9<0}\), how many elements are in (A)?

Explanation opens after your attempt
Correct Answer

A. (5)

Step 1

Concept

\(x^2-9<0\) gives \(x^2<9\).

Step 2

Why this answer is correct

The integer solutions are (-2,-1,0,1,2).

Step 3

Exam Tip

(-3) and (3) are not included because the inequality is strict. चरण 1: \(x^2-9<0\) से \(x^2<9\) मिलता है। चरण 2: पूर्णांक हल (-2,-1,0,1,2) हैं। चरण 3: (-3) और (3) शामिल नहीं होंगे क्योंकि असमानता कड़ी है।

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Mathematics Answer, Explanation and Revision Hints

यदि \(A={x\in \mathbb{Z}:x^2-9<0}\) है, तो (A) में कितने अवयव हैं? / If \(A={x\in \mathbb{Z}:x^2-9<0}\), how many elements are in (A)?

Correct Answer: A. (5). Explanation: चरण 1: \(x^2-9<0\) से \(x^2<9\) मिलता है। चरण 2: पूर्णांक हल (-2,-1,0,1,2) हैं। चरण 3: (-3) और (3) शामिल नहीं होंगे क्योंकि असमानता कड़ी है। / Step 1: \(x^2-9<0\) gives \(x^2<9\). Step 2: The integer solutions are (-2,-1,0,1,2). Step 3: (-3) and (3) are not included because the inequality is strict.

Which concept should I revise for this Mathematics MCQ?

\(x^2-9<0\) gives \(x^2<9\).

What exam hint can help solve this Mathematics question?

(-3) and (3) are not included because the inequality is strict. चरण 1: \(x^2-9<0\) से \(x^2<9\) मिलता है। चरण 2: पूर्णांक हल (-2,-1,0,1,2) हैं। चरण 3: (-3) और (3) शामिल नहीं होंगे क्योंकि असमानता कड़ी है।