Question

Here is a number pattern: 1/2, 1/4, 1/6, 1/8, 1/10.
Write an expression for the nth term

Answer 1

n = 1

Denominator = 2 = 2 * 1


n = 2

Denominator = 4 = 2 * 2


n = 3

Denominator = 6 = 2 * 3


n = 4

Denominator = 8 = 2 * 4


n = 5

Denominator = 10 = 2 * 5


Expression for the n-th term:

1 / 2n

Answer 2

What is the 11th term in the sequence −1, 4, −9, 16, −25, ..? *