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shusha [124]
4 years ago
7

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

Mathematics
1 answer:
miskamm [114]4 years ago
7 0

Answer:

aₙ = 30 - 5n

Step-by-step explanation:

25,20,15,10, ...

<u>We see from the given series that it is AP with:</u>

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

<u>Then formula is:</u>

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