APPC 2.1 video check

What is a sequence?

• A connected line or curve on a graph.

• A set of numbers that are always infinite.

• An ordered list of numbers where each number is a term.

• A list of numbers with no specific order.

What defines an arithmetic sequence?

• Each successive term has a common ratio.

• The difference between successive terms is constant.

• It is always an infinite list of numbers.

• The graph is a connected line or curve.

Which formula can be used to write the rule for an arithmetic sequence using any k-th term?

• a_n = a_0 + dn

• a_n = a_k + d(n - k)

• a_n = a_k - d(n - k)

• a_n = a_k * d(n - k)

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What is the rule for the arithmetic sequence {7, 2, -3, -8, ...} using the 1st term (k = 1) to set your rule?

• a_n = 7 + 5(n-1)

• a_n = 7 - 5(n-1)

• a_n = 7 - 5n

• a_n = 7 + 5n

What is the rule for the geometric sequence {2, 6, 18, 54, ...} using the first term (k=1)?

• g_n = 2 * 3^n

• g_n = (2/3) * 3^n

• g_n = 2 * 3^(n-1)

• g_n = 2 * (1/3)^(n-1)