Kabuuan o sum ng mga even number na hindi lalampas ng 30

2
by tinayombao

• Brainly User
2015-10-26T08:46:46+08:00

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Sum of series in Arithmetic Sequence:

Where:
= is the sum of the series
n = term in a series ⇒ ?
= is the first term, 2
= is the last term, 28

Arithmetic series = {x/x is an even number<30}
Arithmetic sequence: {2, 4,...,28}

Even number, multiple of 2:  the common difference (d)  is 2
1)  First, find the number of terms in the series

28 = 2 + (n-1)(2)
28 = 2 + 2n - 2
28 = 2n
28/2 = 2n/2
n = 14
The number of terms from 2 to 28 is 14.

2)  Solve for the sum of the series:

= 210

The sum of the even numbers from 2 to 28 is 210.

2015-11-01T23:58:21+08:00
2+4+6+8+10+12+14+16+18+20+22+24+26+28=30+30+30+30+30+30+30=210