Answer
b1 = 1
b2 = 1 + 3(2) = 7
b3 = 7 + 3(3) = 16
b4 = 16 + 3(4) = 28
Work Step by Step
b1 = 1
b2 = 1 + 3(2) = 7
b3 = 7 + 3(3) = 16
b4 = 16 + 3(4) = 28
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