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cubic-form MCQ Questions for Class 9

cubic-form se related questions ko ek jagah revise karein. Har question me bilingual content, answer feedback aur explanation available hai.

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2 questions tagged with cubic-form.

Question 1/2 Expert Mathematics Sequences and Progressions Sequences Class 9 Level 43

यदि \(a_n=2n^3-n\) है तो \(a_6-a_4\) का सही मान क्या है?

If \(a_n=2n^3-n\), what is the correct value of \(a_6-a_4\)?

Explanation opens after your attempt
Correct Answer

C. (302)

Step 1

Concept

\(a_6=2\times216-6=426\) and \(a_4=2\times64-4=124\). Therefore the difference is (302).

Step 2

Why this answer is correct

The correct answer is C. (302). \(a_6=2\times216-6=426\) and \(a_4=2\times64-4=124\). Therefore the difference is (302).

Step 3

Exam Tip

\(a_6=2\times216-6=426\) और \(a_4=2\times64-4=124\) है। इसलिए अंतर (302) है।

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Question 2/2 Expert Mathematics Sequences and Progressions Sequences Class 9 Level 43

यदि \(a_n=2n^3-n\) है तो \(a_6-a_4\) का मान क्या होगा?

If \(a_n=2n^3-n\), what will be the value of \(a_6-a_4\)?

Explanation opens after your attempt
Correct Answer

B. (298)

Step 1

Concept

\(a_6=426\) and \(a_4=124\). The correct difference is (302), so the listed options do not match.

Step 2

Why this answer is correct

The correct answer is B. (298). \(a_6=426\) and \(a_4=124\). The correct difference is (302), so the listed options do not match.

Step 3

Exam Tip

\(a_6=426\) और \(a_4=124\) नहीं बल्कि \(a_4=124\) है। इसलिए सही अंतर (302) नहीं है।

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