Question

find the common difference of an AP whose first and last term are 8 and 65 . the sum of all its terms is 730​

Answer 1

Step-by-step explanation:

ANSWER

Given 730=

2

n

(a+l)

l=65

a=8

730=

2

n

(8+65)

730=

2

n

(73)

10=

2

n

20=n

Now 65=l=a+(n−1)d

65=8+(20−1)d

65−8=19d

57=19d

d=

19

57

=3

The common difference is 3.

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Answer 2

Step-by-step explanation:

maybe maybe this can help you