Question

TSL TUILIN
18. Find the sum of n terms of the series( 4
A
18. Find the sum of n terms of the series
)+(4- *)+(4-3)+...
nceis - 4 and the sum
19. In an A.P., if the first term is 22, the common difference is - 4 and the
find n.
20. In an A.P., if the 5th and 12th terms are 30 and 65 respectively, what is
terms?
. Find the sum of first 51 terms of an A.P. whose second and third te
respectively.
If the sum of 7 terms of an A.P. is 49 and that of 17 terms is 289, find the
[CBSE 201
The first term of an A.P. is 5 the last to​

Answer 1

Brother install the questions properly

they are incomplete