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If the 7th term of an arithmetic progression is 25 and the common difference is 3, what is the 1st term?

Practice Questions

1 question
Q1
If the 7th term of an arithmetic progression is 25 and the common difference is 3, what is the 1st term?
  1. 10
  2. 15
  3. 20
  4. 5

Questions & Step-by-step Solutions

1 item
Q
Q: If the 7th term of an arithmetic progression is 25 and the common difference is 3, what is the 1st term?
Solution: Using the formula for the nth term, a + 6d = 25. Substituting d = 3 gives a + 18 = 25, thus a = 7.
Steps: 0

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