Question

Class-6( patterns in whole numbers) Find the sum of the following: 2+6+10+.....+22 Answer-108

Answer 1

Answer:

Step-by-step explanation:

a = 2 d = 6-2 = 4 l = 22

n=( l-a / d ) + 1

= (22-2/4) +1

(20/4)+1

= 5+1 =6

n =6

Sum of series(Sn) = n/2 ( a+l)

=6/2 ( 2+22)

= 3× 24

= 72

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