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In an arithmetic progression, if the first term is 10 and the common difference is 5, what is the sum of the first 8 terms?

Practice Questions

1 question
Q1
In an arithmetic progression, if the first term is 10 and the common difference is 5, what is the sum of the first 8 terms?
  1. 120
  2. 130
  3. 140
  4. 150

Questions & Step-by-step Solutions

1 item
Q
Q: In an arithmetic progression, if the first term is 10 and the common difference is 5, what is the sum of the first 8 terms?
Solution: The sum of the first n terms is given by S_n = n/2 * (2a + (n-1)d). Here, S_8 = 8/2 * (20 + 35) = 4 * 55 = 220.
Steps: 0

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