Math, asked by shouryatripathi781, 7 months ago

sum of nth term of ap 20 example​

Answers

Answered by abcxyz79
1

Step-by-step explanation:

T

n

=5n−3

T

1

=5(1)−3=2

T

2

=5(2)−3=7

d=T

2

−T

1

=7−2=5

a=T

1

=2

S

20

=

2

20

[2a+19d]

=10(4+95)

=990.

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