Question

The first term of an arithmetic sequence is 2 and the fourth term is 11. Find the sum of the first 50 terms.

Answer 1

we first need the common difference here
since 4th term is 11
so
11= 2+(4-1)d [ d =common difference of the concerned arithmetic sequence]

Answer 2

can you find 'd' now
sum of the first 50 terms = (50/2) *( 2*2 + (50-1)*d)
now you may plug the value of d to get ur answer

Answer 3

is the common difference as in like the difference from a1 to a2?

Answer 4

yup

Answer 5

here d=3

Answer 6

did you get 3775?

Answer 7

correct

Answer 8

thanks :D

Answer 9

welcome