Find the sum of 10 terms of ap 2, 5, 8, 11....
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Answer:-
- Sum of 10 terms of AP 2, 5, 8, 11..... is 155 .
Step-by-step explanation:-
- We have,
AP = 2, 5, 8, 11.......
Here, a = 2 & d = 5-2=3
- We know that,
- S(n) = n/2 {2a + (n-1)d}
Now,
- S(10) = 10/2 { 2×2 + (10 - 1) × 3}
= 5 × (4 + 9 ×3)
= 5 × (4 +27)
= 5 × 31
= 155
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