What are the explicit equation and domain for a geometric sequence with a first term of 3 and a second term of −9?
2 answers:
U can find the common ratio by dividing the 2nd term by the first term
r = -9/3 = -3
an = a1 * r^(n - 1)
a1 = 1st term = 3
r = common difference = -3
now sub
an = 3 * -3^(n - 1) <== ur formula
domain : all integers where n > = 1 <==
Answer:
Step-by-step explanation:
Given: A geometric sequence with its first term
and second term
We know that the common ratio in of a geometric sequence=
Thus, common ratio
We know that the explicit rule for geometric sequence is written as
Thus, the explicit rule for the given geometric sequence is for every n ,a natural number.
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