bunn95
29.01.2020 •
Mathematics
Find an equation for the nth term of the sequence. -4, -16, -64, -256,
a. an = 4 • -4n
b. an = 4 • -4n + 1
c. an = -4 • 4n
d. an = -4 • 4n - 1
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Ответ:
an=a1(r)^(n-1)
a1=first term
r=commonr atio
n=number of term
first term is -4
common ratio is -16/-4=4
so
a1=-4
r=4
D is the answer
Ответ:
10 inches by 4 inches