১৮ এবং ৭২ এর গুণোত্তর গড় কোনটি?
Created: 1 year ago |
Updated: 4 weeks ago
এখানে, প্রথম পদ = a = 18
সাধারন অনুপাত = r
আমরা জানি, a + ar + ar² + ar³ + .......
ar² = 72
= 18r² = 72
= r² = 72/18
= r² = 4
= r = 2
সুতরাং, ar = 18 × 2
= 36
Md Azizur Rahman
Founder of Satt
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