किसी समान्तर श्रेणी में (a=5), (d=7) और \(a_n=103\) है। (n) का मान क्या है?
In an AP, (a=5), (d=7), and \(a_n=103\). What is the value of (n)?
Explanation opens after your attempt
C. (15)
Concept
From (103=5+(n-1)7), (98=7(n-1)), so (n=15). When finding the term number, remember to add (1) at the end.
Why this answer is correct
The correct answer is C. (15). From (103=5+(n-1)7), (98=7(n-1)), so (n=15). When finding the term number, remember to add (1) at the end.
Exam Tip
(103=5+(n-1)7) से (98=7(n-1)), अतः (n=15)। पद संख्या निकालते समय अंत में (1) जोड़ना न भूलें।
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