Question

find the sum of 20 terms of the series 3, 5, 7, 9​

Answer 1

Answer:

3+5 =8 next=8+7=15 and lastly =15+9=24

Answer 2

Answer:

hi, here is your answer-

S20=20/2 (2×3+20-1×2)

=10 (6+19×2)

=10×44

=440.

so,the sum of 20 terms is 440.

you have to use this formula to solve this question is (2a+(n-1)×d).

i hope it helps.

please mark me brainliest.