Question

Find the number of terms in AP 8, 12, 16, ……….. 124.​

Answer 1

Answer:

ANSWER

The sum of last ten terms of the AP: 8,10,12,...,126 is same as the sum of first ten terms of the AP: 126,124,122,...,8.

Therefore, a=126,d=−2 and n=10.

Now, S

10

=

2

10

[2×126+(10−1)×−2]

⇒S

10

=5×[252−18]=1170

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Answer 2

Answer:

this is ur answer...

Step-by-step explanation:

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