Answered

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Determine the sum of the first 27 even Natural Numbers.
378
2,700
270
756

Sagot :

hinnocentholumede

Answer:

this is called AP arithmetic progression

2, 4, 6.........

sn=n/2(2a+(n-1)d)

S27=

[tex] \frac{27}{2 } (2 \times 2 + (27 - 1)2)[/tex]

[tex] \frac{72}{2} (4 + (26 \times 2)[/tex]

[tex] \frac{27}{2} (4 + 52)[/tex]

[tex] \frac{27}{2} \times 56[/tex]

[tex]27 \times 28[/tex]

=756

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