Write the following Arithmetic sequence using an Explicit Formula: a1 = 8, an = an-1 -2

an = 8 - 2*(n - 1)

Step-by-step explanation:

a1 ; ; an-1 ; an

r = an - an-1

r = (an-1 - 2) - an-1

r = an-1 - 2 - an-1

r = -2

So:

an = a1 + r*(n - 1)

an = 8 + (-2)*(n - 1)

an = 8 - 2*(n - 1)

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step-by-step explanation: