Find the sum of the 20 terms of 5 +10+15.
Answers
Answered by
0
Answer:
Sn = 20/2[2×5+(20-1)5
S²⁰ = 10[ 10+ 95 ]
s²⁰ = 10× 105
s²⁰ = 1050
Answered by
0
Answer:
common difference = -5 ( as we need term from the last 20 th from the last .
Step-by-step explanation:
=150 + (20-1) × -5 = 55
hope you satisfied this answer
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