समानांतर श्रेढ़ी \(2,7,12,17,\ldots\) के पहले (5) पदों का योग क्या है?
What is the sum of the first (5) terms of the arithmetic progression \(2,7,12,17,\ldots\)?
Explanation opens after your attempt
B. (60)
Concept
The first (5) terms are (2,7,12,17,22), and their sum is (60). For small (n), writing and adding terms is quick.
Why this answer is correct
The correct answer is B. (60). The first (5) terms are (2,7,12,17,22), and their sum is (60). For small (n), writing and adding terms is quick.
Exam Tip
पहले (5) पद (2,7,12,17,22) हैं और योग (60) है। छोटे (n) में पद लिखकर जोड़ना तेज होता है।
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