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What is the recursive definition for 25,20,15,10?
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What is the recursive definition for 25,20,15,10?

User Umamaheswaran
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1 Answer

4 votes

Answer:

aₙ = 30 - 5n

Explanation:

25,20,15,10, ...

We see from the given series that it is AP with:

  • First term = 25
  • Common difference = -5 and it is decreasing series

Then formula is:

  • aₙ= a₁ + (n-1)d
  • aₙ= 25 + (n-1)(-5)
  • aₙ= 25 - 5n + 5
  • aₙ = 30 - 5n
User Michael Swarts
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