Concept-wise Practice

double-plus-n MCQ Questions for Class 9

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

All Tags Search Similar

Practice Questions

2 questions tagged with double-plus-n.

Question 1/2 Medium Mathematics Sequences and Progressions Recursive rule Class 9 Level 45

यदि \(a_1=2\) और \(a_{n+1}=2a_n+n\) है तो \(a_5\) का मान क्या होगा?

If \(a_1=2\) and \(a_{n+1}=2a_n+n\), what is the value of \(a_5\)?

Explanation opens after your attempt
Correct Answer

D. (58)

Step 1

Concept

The terms are (2,5,12,27,58), so \(a_5=58\). Exam tip: double the previous term first and then add (n).

Step 2

Why this answer is correct

The correct answer is D. (58). The terms are (2,5,12,27,58), so \(a_5=58\). Exam tip: double the previous term first and then add (n).

Step 3

Exam Tip

पद (2,5,12,27,58) हैं इसलिए \(a_5=58\) है। पहले पिछले पद को दोगुना करें फिर (n) जोड़ें।

Open Question Page
Ask Friends
Question 2/2 Medium Mathematics Sequences and Progressions Recursive rule Class 9 Level 44

यदि \(a_1=2\) और \(a_{n+1}=2a_n+n\) है तो \(a_4\) का मान क्या होगा?

If \(a_1=2\) and \(a_{n+1}=2a_n+n\), what is the value of \(a_4\)?

Explanation opens after your attempt
Correct Answer

C. (27)

Step 1

Concept

The terms are (2,5,12,27), so \(a_4=27\). Exam tip: double the previous term first and then add (n).

Step 2

Why this answer is correct

The correct answer is C. (27). The terms are (2,5,12,27), so \(a_4=27\). Exam tip: double the previous term first and then add (n).

Step 3

Exam Tip

पद (2,5,12,27) हैं इसलिए \(a_4=27\) है। पहले पिछले पद को दोगुना करें फिर (n) जोड़ें।

Open Question Page
Ask Friends

double-plus-n Revision Links

All MCQ Tags

Browse concept directory

All Subjects

Subject-wise practice

Search double-plus-n

More keyword results