यदि \(a_n=12n+q\) और \(a_{8n}-a_{3n}=780\) है, तो (n) का मान क्या है?
If \(a_n=12n+q\) and \(a_{8n}-a_{3n}=780\), what is the value of (n)?
Explanation opens after your attempt
C. (13)
Concept
(a_{8n}-a_{3n}=(96n+q)-(36n+q)=60n). From (60n=780), (n=13).
Why this answer is correct
The correct answer is C. (13). (a_{8n}-a_{3n}=(96n+q)-(36n+q)=60n). From (60n=780), (n=13).
Exam Tip
(a_{8n}-a_{3n}=(96n+q)-(36n+q)=60n)। (60n=780) से (n=13)।
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