Question

find AP where 7th and 13th terms are 34,64 respectively also find s20​

Answer 1

Answer:

Step-by-step explanation:

7th term=a+6d=34----(1)

13th term=a+12d=64--(2)

(1) and (2)

6d=30

d=5

a=34-30=4

20th term=a+19d=4+76=80

Answer 2

Answer:

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