What is the sum of the first 10 numbers of the arithmetic sequence 1,2,3,……
Sum of how many terms of this sequence starting from the first is 300?
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5
Answer:
hope it will help you
Step-by-step explanation:
The sum of an arithmetic series is found by multiplying the number of terms times the average of the first and last terms. Formula: or. Example: 3 + 7 + 11 + 15 + ··· + 99 has a1 = 3 and d = 4.
Answered by
4
Answer:
answer is 54 and second one is have no idea
Step-by-step explanation:
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