কোন সমান্তর ধারায় p- তম পদ q এবং q তম পদ হলে p (p+q) কততম পদ কত ?
Created: 6 years ago |
Updated: 2 years ago
best des
ধারাটির p তম পদ = a + ( p - 1) d
এবং, q তম পদ = a + ( q - 1) d
এবং, p + q তম পদ = a + ( p + q - 1)d
প্রশ্নমতে,
a + ( p - 1) d = q........ (1)
a + ( q - 1) d = p........ (2)
(1) - ( 2) =
{ a + ( p - 1) d } - { a + ( q - 1) d} = q - p
বা, a + ( p - 1) d - a - ( q - 1) d = q - p
বা, ( p - 1) d - (q - 1) d = q - p
বা, d ( p - 1 - q - 1) = q - p
বা, d ( p - q) = - ( p - q)
d = - 1
সু্তরাং, p + q তমপদ = a + ( p + q - 1) d = q + qd = q + q ( - 1) = q - q = 0.
Md Azizur Rahman
Founder of Satt
Related Question
View More
Created: 6 years ago |
Updated: 1 week ago
Created: 6 years ago |
Updated: 9 months ago
Created: 6 years ago |
Updated: 3 months ago
Created: 6 years ago |
Updated: 1 year ago
Promotion
Download Our Mobile Apps
