Question

find the sum of first 123 even natural numbers ​

Answer 1

Answer:

15252

Step-by-step explanation:

. . . . . . . . . . . . . . . . . . . . . . . .

Answer 2

Answer:

The answer will be 15252 .

Step-by-step explanation:

The given sequence is 2 , 4, 6 , 8 ....

First term = 2

Common difference , d = 2

Number of terms = 123

we know that,

S = n/2 [ 2a + ( n - 1 ) d ]

= 123/2 [ 2(2+ ( 123-1)(2)

= 123/2 [ 4+244]

= 123 × 124

= 15252

Hence the sum of first 123 even natural number is 12525.

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