यदि \(A={x\in R:x^2\leq 16}\), तो (A) कौन-सा अंतराल है?

If \(A={x\in R:x^2\leq 16}\), which interval is (A)?

Explanation opens after your attempt
Correct Answer

B. ([-4,4])

Step 1

Concept

From \(x^2\leq 16\), we get \(-4\leq x\leq 4\).

Step 2

Why this answer is correct

Equality is included, so both endpoints are included.

Step 3

Exam Tip

Use square brackets when equality is allowed. चरण 1: \(x^2\leq 16\) से \(-4\leq x\leq 4\) मिलता है। चरण 2: बराबरी शामिल है, इसलिए दोनों छोर शामिल होंगे। चरण 3: \(\leq\) होने पर वर्ग कोष्ठक लगाना न भूलें।

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Mathematics Answer, Explanation and Revision Hints

यदि \(A={x\in R:x^2\leq 16}\), तो (A) कौन-सा अंतराल है? / If \(A={x\in R:x^2\leq 16}\), which interval is (A)?

Correct Answer: B. ([-4,4]). Explanation: चरण 1: \(x^2\leq 16\) से \(-4\leq x\leq 4\) मिलता है। चरण 2: बराबरी शामिल है, इसलिए दोनों छोर शामिल होंगे। चरण 3: \(\leq\) होने पर वर्ग कोष्ठक लगाना न भूलें। / Step 1: From \(x^2\leq 16\), we get \(-4\leq x\leq 4\). Step 2: Equality is included, so both endpoints are included. Step 3: Use square brackets when equality is allowed.

Which concept should I revise for this Mathematics MCQ?

From \(x^2\leq 16\), we get \(-4\leq x\leq 4\).

What exam hint can help solve this Mathematics question?

Use square brackets when equality is allowed. चरण 1: \(x^2\leq 16\) से \(-4\leq x\leq 4\) मिलता है। चरण 2: बराबरी शामिल है, इसलिए दोनों छोर शामिल होंगे। चरण 3: \(\leq\) होने पर वर्ग कोष्ठक लगाना न भूलें।