Question

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

Answer 1

Answer:

this is called AP arithmetic progression

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

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

S27=

$\frac{27}{2 } (2 \times 2 + (27 - 1)2)$

$\frac{72}{2} (4 + (26 \times 2)$

$\frac{27}{2} (4 + 52)$

$\frac{27}{2} \times 56$

$27 \times 28$

=756