Question
  1. If the 1st term of an AP is 5 and the 9th term is 25. Find the common difference.
  2. An AP contains 30 terms. Given that the 10th term is 21 and that the sum of the last 10 terms is 675. Find the sum of the first 10 terms.
  3. Given f(x) = . Find f –1(x)

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