यदि (q(x)=(k+1)2x-9+\(k^2-1\)x-5-4x+6) और (k=-1), तो (q(x)) की डिग्री क्या है?

If (q(x)=(k+1)2x-9+\(k^2-1\)x-5-4x+6) and (k=-1), what is the degree of (q(x))?

Author: Muft Shiksha Editorial Team Published:
Explanation opens after your attempt
Correct Answer

C. (1)

Step 1

Concept

Putting (k=-1) removes both \(x^9\) and \(x^5\) terms. The remaining (-4x+6) has degree (1).

Step 2

Why this answer is correct

The correct answer is C. (1). Putting (k=-1) removes both \(x^9\) and \(x^5\) terms. The remaining (-4x+6) has degree (1).

Step 3

Exam Tip

(k=-1) रखने पर \(x^9\) और \(x^5\) दोनों पद हट जाते हैं। बचा (-4x+6) है जिसकी डिग्री (1) है।

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Mathematics Answer, Explanation and Revision Hints

यदि (q(x)=(k+1)2x-9+\(k^2-1\)x-5-4x+6) और (k=-1), तो (q(x)) की डिग्री क्या है? / If (q(x)=(k+1)2x-9+\(k^2-1\)x-5-4x+6) and (k=-1), what is the degree of (q(x))?

Correct Answer: C. (1). Explanation: (k=-1) रखने पर \(x^9\) और \(x^5\) दोनों पद हट जाते हैं। बचा (-4x+6) है जिसकी डिग्री (1) है। / Putting (k=-1) removes both \(x^9\) and \(x^5\) terms. The remaining (-4x+6) has degree (1).

Which concept should I revise for this Mathematics MCQ?

Putting (k=-1) removes both \(x^9\) and \(x^5\) terms. The remaining (-4x+6) has degree (1).

What exam hint can help solve this Mathematics question?

(k=-1) रखने पर \(x^9\) और \(x^5\) दोनों पद हट जाते हैं। बचा (-4x+6) है जिसकी डिग्री (1) है।