Question: b. If a sequence has a first term of an 12 and a common difference d = -7. Write the formula that describes this

b. If a sequence has a first term of an 12 and

b. If a sequence has a first term of an 12 and a common difference d = -7. Write the formula that describes this sequence. Use the formula of the arithmetic sequence. Hint: (Use the brackets for subscripts eg for a,, you can use a(n) (5 Marks)

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