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Kipish [7]
3 years ago
5

3. For the following geometric sequence, determine a1 and r and find an explicit formula for the sequence: 2, -6, 18, -54…

Mathematics
1 answer:
Vilka [71]3 years ago
4 0

Step-by-step explanation:

a1 is the first term.  In this case, 2.

r is the common ratio.  Each term is multiplied by -3 to get the next term, so r = -3.

an = 2 (-3)ⁿ⁻¹

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