Question

What is the sum of all odd integers between 2 and 16

Answer 1

Answer:

The odd integers between 2 and 100 which are divisible by 3 are 3, 9, 15, 21, ..., 99.

Here, a=3 and d=6.

an=99

⇒a+(n−1)d=99

⇒3+(n−1)×6=99

⇒6(n−1)=96

⇒n−1=16

⇒n=17

Therefore,

Required sum = 2n(a+l)=217(3+99)=867

Step-by-step explanation:

I hope this is helpfull for you☺

Follow me nd like my answer✌

Answer 2

Answer:

63

Step-by-step explanation:

odd integers are 3,5,7,9,11,13,15

sum =n(2a+(n-1)d)

2

{a=3,d=2,n=7}

=7 (2×3+(7-1)2)

2

=7 (6+12)

2

=7 ×18

2

=7×9

=63