यदि \(a_n=5n+9\) है, तो इस समांतर श्रेणी के पहले (6) पदों का योग क्या है?
If \(a_n=5n+9\), what is the sum of the first (6) terms of this arithmetic progression?
Explanation opens after your attempt
C. (159)
Concept
The first (6) terms are (14,19,24,29,34,39), and their sum is (159). Forming terms from the rule and adding is a safe method.
Why this answer is correct
The correct answer is C. (159). The first (6) terms are (14,19,24,29,34,39), and their sum is (159). Forming terms from the rule and adding is a safe method.
Exam Tip
पहले (6) पद (14,19,24,29,34,39) हैं और योग (159) है। नियम से पद बनाकर जोड़ना सुरक्षित तरीका है।
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