Question

Find the first, fourth, and tenth terms of the arithmetic sequence described by the given rule.

A(n)=-2+(n-1)(-2.2)

Answer 1

You can just insert 1, 4, and 10 for n.

A(1) = -2 + (1 - 1) * (-2.2) = -2
A(4) = -2 + (4 - 1) * (-2.2) = -8.6
A(10) = -2 + (10 - 1) * (-2.2) = -21.8