Question

What is the sum of first 10 terms of 1,8,15,22,29,...?

Answer 1

Step-by-step explanation:

HEYA USER

HERE'S YOUR ANSWER

THE ANSWER IS 325

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Answer 2

The answer will be "S₁₀ = 325". Further explanation is given below.

Step-by-step explanation:

Given series is:

1,8,15,22,29,.....

According to the above series,

First 10 terms, n= 10

The first term, a₁= 1

The second term, a₂= 8

The difference, d= a₂-a₁

                            = 8-1

                          d= 7

As we know,

Sum of the terms, Sn= $\frac{n}{2}$[2a+(n-1)d]

On putting the values of "n", "a" and "d" in the above formula, we get

⇒ S₁₀ = $\frac{10}{2}$[2×1+(10-1)7]

⇒       = 5[2+(9)7]

⇒       = 5[2+63]

⇒       = 5[65]

⇒ S₁₀ = 325

Learn more:

Find the third term...

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