Question

Find the sum of "n" even natural number and sum of first 20 even natural number .

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Answer 1

Answer:

hi sis,

first I answer ur question ....sum of first 20 even natural no. is 420....there is a formula for finding this....

$Sum = n/2 \times (a + Tn)$

where Tn is the last term i.e. 40

n is the no. of term

a is the first term

Step-by-step explanation:

The first term a is 2

Total number of terms n = 20

Last term Tn =40

now here the main part of the solution....

Sum = n/2 x (a + Tn)

= 20/2 x (2 + 40)

= (20 x 42)/ 2

= 840/2

=420

Here is your answer....thank u for wishing me....will never stop supporting u.

Answer 2

Step-by-step explanation:

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