यदि \(a_n=kn+5\) और \(a_{15}-a_6=63\) है तो \(a_{20}\) क्या होगा?

If \(a_n=kn+5\) and \(a_{15}-a_6=63\), what is \(a_{20}\)?

Explanation opens after your attempt
Correct Answer

C. (145)

Step 1

Concept

From (9k=63), (k=7). Therefore \(a_{20}=7\times20+5=145\).

Step 2

Why this answer is correct

The correct answer is C. (145). From (9k=63), (k=7). Therefore \(a_{20}=7\times20+5=145\).

Step 3

Exam Tip

(9k=63) से (k=7)। इसलिए \(a_{20}=7\times20+5=145\)।

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FAQs

Mathematics Answer, Explanation and Revision Hints

यदि \(a_n=kn+5\) और \(a_{15}-a_6=63\) है तो \(a_{20}\) क्या होगा? / If \(a_n=kn+5\) and \(a_{15}-a_6=63\), what is \(a_{20}\)?

Correct Answer: C. (145). Explanation: (9k=63) से (k=7)। इसलिए \(a_{20}=7\times20+5=145\)। / From (9k=63), (k=7). Therefore \(a_{20}=7\times20+5=145\).

Which concept should I revise for this Mathematics MCQ?

From (9k=63), (k=7). Therefore \(a_{20}=7\times20+5=145\).

What exam hint can help solve this Mathematics question?

(9k=63) से (k=7)। इसलिए \(a_{20}=7\times20+5=145\)।