Question

find the sum of 1st 30 natural numbers​

Answer 1

Answer:

First 30 natural numbers are 1 to 30. So, n = 30

From the above equation, it is known that, a =1, d = 2 – 1 = 1, and an = 30

Using the above equation of sum of n terms in an AP and substituting the values,

Sn = 30/2 [2 × 1+ (30-1) × 1]

Sn = 15 [2 + 29]

Sn = 15 [31]

Sn = 465

So, The sum of 1 to 30 is 465.

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Answer 2

Answer:

By using Sn formula

Step-by-step explanation:

sn= 30/2(2(1)+(30-1)1)

Sn=15(2+29)

Sn= 15(31)

Sn= 465

answer is 465