5+8+11+14+.......... ধারার কোন পদ 302?
Created: 6 years ago |
Updated: 2 years ago
best des
5 + 8 + 11 + 14 + .......
ধারাটির, প্রথম পদ a = 5
সাধারণ অন্তর d = 8 - 5 = 3
n তম পদ = 302
পদসংখ্যা n = ?
n তম পদ = a + (n - 1)d
বা, 302 = 5 + (n - 1)3
বা, 302 = 5 + 3n - 3
বা, 302 = 2 + 3n
বা, 3n = 300
n = 100
অর্থাৎ 100 তম পদের মান 302 ।
Md Azizur Rahman
Founder of Satt
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