Question

please solve this question of mathematics​

Answer 1

Answer:

853

Step-by-step explanation:

Ap=40+37+34+-------------_107

Tn=a+(n-1)d)

-107=40+(n-1)-3)

-107-40=(n-1)-3)

-147=(n-1)-3)

(n-1)=-147/-3

n-1=49

n=50

Sn=n/2(2a+(n-1)d)

50/2(2(40)+(50-1)-3)

25(80)+49*-3)

25(80)-147

2000-147

=853

Answer=853