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Question
5+8+11+14+………….ধারাটির কোন পদ 383 ?
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ANSWER : 1
Descrption
<p>a=5</p><p>d=8-5=3</p><p>n=?</p><p>So</p><p>x=a+(n-1)d</p><p>383=5+(n-1)3</p><p>378=(n-1)3</p><p>n-1=(378÷3)</p><p>n-1=126</p><p>n=127</p>
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