danielahchf
18.12.2020 •
Mathematics
Write the equation of the arithmetic and geometricsequences given 15, 5, ...
a. arithmetic
b. geometric
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Ответ:
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
Ответ: