Question

the sum of the first and 20 term of an arithmetic sequence is 65 what is sum of its second and the 19th term​

Answer 1

Answer:

it is also 65

explanation

suppose the terms

5,10,15,20

25=25

Answer 2

Answer:

65

Step-by-step explanation:

--> 1 term+20th term

--> a+a+19d

--> 2a+19d= 65 --(i)

situation 2 :

--> 2nd term + 19th term

--> a+d +a+18d

--> 2a+19d

Hence , acc. to the first equation the sum of 2nd and 18th term is 65