Question

the first and the last term of an AP containing 20 terms are 500 and 1000 respectively find the sum of 20 terms​?

Answer 1

Answer:

S20=n÷2 (500+1000 )

=10×1500

=15000

Step-by-step explanation:

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Answer 2

Answer:

s20= n/2 (500 + 1000)

= 15000

Step-by-step explanation:

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