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Which of the following represents the general equation for the geometric sequence? -1, -2, -4, ......
5 months ago
Q:
Which of the following represents the general equation for the geometric sequence? -1, -2, -4, ... an = 1 · 2n - 1 an = -2n - 1 an = 2n - 1 an = 1 · 2n + 1
Accepted Solution
A:
-1,-2,-4
an = a1 * r^(n - 1)
a1 = first term = -1
r = common ratio = 2
so the equation would be : an = -1 * 2^(n - 1)