3 years ago

For the geometric sequence with a1=4 and r=5, find a5

1 answer:

6 0

General form of a geometric sequence:

A(n) = A1 × r^(n-1)

A(5) = 4 × 5^(5-1)

A(5) = 4 × 5^(4)

A(5) = 4 × 625

A(5) = 2500

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