Question

question is 12b as shown in the image:

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Answer 1

Answer:

$an = a1 + (n - 1)d \\ an = 3 + (n - 1)7 \\ an = 3 + 7n - 7 \\an = 7n - 4 \\ when \: \: n = 150 \\ a150 = 7(150) - 4 \\ 1050 - 4 \\ a150 = 1046$