Question

find the sum of 5+8+11+.....to 16 term's​

Answer 1

Answer:

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Answer 2

Answer:

440

Explanation:

In the given AP:

1st term = 5

And, Common difference = 8-5 = 11-8 = 3

No. of terms = 16

Then,

Sum of nth term = n/2 × {2a + (n-1)d}

= 16/2 × {2×5 + 15×3}

= 8 {10 + 45}

= 8 × 55

= 440