06-08-2020
Mathematics

contestada

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

Respuesta :

mhanifa mhanifa

06-08-2020

Answer:

aₙ = 30 - 5n

Step-by-step 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

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