2 years ago

Write the equation of the arithmetic and geometricsequences given 15, 5, ...

Mathematics

1 answer:

ivann1987 [24]2 years ago

7 0

Step-by-step explanation:

Arithmetic:

a(n) = a +(n-1)d

a=15

d=5-15=-10

°.° a(n) = 15 +(n–1)-10

Geometric:

a(n)=a*r^(n-1)

a=15

r=5/15=1/3

a(n)=15*(1/3)^(n-1)

hope this helps

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