Use inductive reasoning to write the 6th, 7th and 12th terms of each sequence. Then write a formula for the nth term. Briefly explain your method.

(a) 3, 6, 9, 12, 15, . .
(b) 4, 7, 11, 16, 22, . . .
(c) 1/3, 2/9, 3/27, 4/81, 5/243...


(a) 7th term = 18, 12th term = 36, nth term = 3n/1, each term goes up by + 3.

(b) 7th term = 29, 12th term = 162,nth term =1/2 (n 2 + 3n + 4).

(c) 7th term = , 7/729; 12th term = , 3n, nth term =

Mathematics

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A.

B.

C.

D.

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