Math, asked by sumanyadavnisha, 10 months ago

Sum the following:
(i) 1, 3, 9, 27, ...... to 20 terms

Answers

Answered by vaishnav7474

0

Answer:

210

Step-by-step explanation:

n (n+1)/2

20 (20+1)/2

10 (21)

210

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