zaramohamud688 zaramohamud688
  • 03-04-2020
  • Mathematics
contestada

If f(1)=9 and f(n)=f(n-1)+2 then find the value of f(5)

Respuesta :

ghanami
ghanami ghanami
  • 03-04-2020

Answer:

Step-by-step explanation:

hello :

f(n)=f(n-1)+2

means : f(n)-f(n-1)=2

this is the arithmetic seq when the common dif is d= 2  and the first term is : 9

the n-ieme term is : f(n)  = f(1) +(n-1)d

f(n) =9+2(n-1)

f(n) = 2n+7

so : f(5) = 2(5)+7 = 17

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