Question

using the explict formula find the 11th term f(n)=21+2(n-1)

Answer 1

We are given the explicit formula to be

f(n) = 21 + 2(n - 1)

Where n = number of terms

Find the 11th term?

Using the above formula

Let n = 11

f(11) = 21 + 2(11 - 1)

f(11) = 21 + 2(10)

f(11) = 21 + 20

f(11) = 41

The answer is 41