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elena55 [62]
3 years ago
10

Please help. 20 points and brainliest.

Mathematics
2 answers:
AlekseyPX3 years ago
8 0
N = 3
t3 = 2(3)^3-1
t3 = 2 x 3^2
t3 = 2 x 9
t3 = 18
AlekseyPX3 years ago
4 0

Answer:

18

Step-by-step explanation:

Plugging in 3 for n, we get:

t_n=2(3)^{3-1} \\\\t_n=2(3)^2 \\\\t_n=2(9) \\\\t_n=18

Hope this helps!

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