In an arithmetic progression, if the first term is 7 and the common difference i

Practice Questions

Q1
In an arithmetic progression, if the first term is 7 and the common difference is -2, what is the 6th term?
  1. -1
  2. 1
  3. 3
  4. 5

Questions & Step-by-Step Solutions

In an arithmetic progression, if the first term is 7 and the common difference is -2, what is the 6th term?
  • Step 1: Identify the first term (a) of the arithmetic progression, which is given as 7.
  • Step 2: Identify the common difference (d), which is given as -2.
  • Step 3: Determine the position of the term you want to find, which is the 6th term (n = 6).
  • Step 4: Use the formula for the nth term of an arithmetic progression: nth term = a + (n - 1) * d.
  • Step 5: Substitute the values into the formula: 6th term = 7 + (6 - 1) * (-2).
  • Step 6: Calculate (6 - 1) which equals 5.
  • Step 7: Multiply 5 by -2, which equals -10.
  • Step 8: Add 7 and -10 together: 7 - 10 = -3.
  • Step 9: Conclude that the 6th term is -3.
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