Question

find the sum of the following 1) 37,11,......up to 40 terms​

Answer 1

answer is -18800

Step-by-step explanation:

a=37

d=11-37=-26

n=40

Sum of 40 terms =n/2 ( 2a+(n-1)d)

40/2(2×37+(40-1)-26)

20(74+39×(-26))

20(74-1014)

20×(-940)

-18800