यदि किसी गुणोत्तर श्रेणी के पहले (4) पद (2,8,32,128) हैं तो \(S_4\) क्या है?
If the first (4) terms of a geometric progression are (2,8,32,128), what is \(S_4\)?
Explanation opens after your attempt
C. (170)
Concept
The sum is (2+8+32+128=170). In exams direct addition is also fast for small (n).
Why this answer is correct
The correct answer is C. (170). The sum is (2+8+32+128=170). In exams direct addition is also fast for small (n).
Exam Tip
योग (2+8+32+128=170) है। परीक्षा में छोटे (n) के लिए सीधे जोड़ना भी तेज होता है।
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