Question

Find the sum of the certain number of terms of the ap 25 22 19 is 116 find the last term

Answer 1

Answer:

Last term in A.P = 4

Step-by-step explanation:

Given A.P :

25,22,19,...

First term (a) = 25

Common difference (d) = a2-a1

= 22-25

= -3

\* given

Splitting the middle term, we get

n should not be fraction.

Therefore,

n = 8

Now,

Last term (l) = a+(n-1)d

= 25+(8-1)(-3)

= 25+7(-3)

= 25 -21

= 4

Therefore,

Last term in A.P = 4

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