नियम \(a_n=20-2n\) से पहला पद \(a_1\) क्या होगा?
Using \(a_n=20-2n\), what will the first term \(a_1\) be?
Explanation opens after your attempt
C. (18)
Concept
Putting (n=1), \(a_1=20-2=18\). The first term is found by using (n=1).
Why this answer is correct
The correct answer is C. (18). Putting (n=1), \(a_1=20-2=18\). The first term is found by using (n=1).
Exam Tip
(n=1) रखने पर \(a_1=20-2=18\) है। पहला पद हमेशा (n=1) से मिलता है।
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