In a GP if a=3 and r=2 then what is the sum of first 5 terms?
GP में a=3 r=2 है तो पहले 5 पदों का योग कितना होगा?
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Correct Answer
D. 93
ExplanationStep 1: Use GP sum formula Sn=a(r^n-1)/(r-1). Step 2: S5=3(2^5-1)/(2-1)=3×31=93. Step 3: When r is greater than 1 use r^n-1.
Step 1: GP sum formula Sn=a(r^n-1)/(r-1) लगाएं। Step 2: S5=3(2^5-1)/(2-1)=3×31=93। Step 3: r greater than 1 हो तो r^n-1 use करें।