Math, asked by keerthanakr222, 9 months ago

if an=2n+3 nind S1,S2,S3.

Answers

Answered by sreeramavidya
1

Step-by-step explanation:

T

n

=2n+3 then,

T

1

=(2×1)+3=2+3=5

T

2

=(2×2)+3=4+3=7

T

3

=(2×3)+3=6+3=9

Therefore, S

3

is the sum of T

1

, T

2

and T

3

that is:

S

3

=T

1

+T

2

+T

3

=5+7+9=21

Hence, S

3

=21.

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