jossselynn jossselynn

15-05-2020
Mathematics

contestada

how do I find the 17th term of a18=-2 , d=-5

Respuesta :

Mar92781 Mar92781

16-05-2020

Answer:

a17=3

Step-by-step explanation:

an=a1+(n−1)d geometric sequence formula

-2=a1+(18-1)(-5)

-2=a1+17(-5)

-2=a1-85

a1=83

a17=83+(17-1)(-5)

a17=83+16(-5)

a17=83-80

a17=3

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