Question

For each sequence find the first four terms and the tenth term 3n-4

Answer 1

Below.

Explanation:

We get the first 4 terms by plugging in n = 1 2 3 and 4:

3(1) - 4 = -1 , 3(2) - 4 = 2 ...

First 4 terms are

-1, 2, 5, 8

10th term = 3(10) -4 = 26.

Answer 2

= 1, 2, 5, 8 and 26

Explanation:

To find the first 4 terms, substitute n = 1, 2, 3, 4 into the formula

a₁ = 3(1) - 4 = 3 - 4 = - 1

a₂ = 3(2) - 4 = 6 - 4 = 2

a₃ = 3(3) - 4 = 9 - 4 = 5

a₄ = 3(4) - 4 = 12 - 4 = 8

The first 4 terms are

- 1, 2, 5, 8

Substitute n = 10

a₁₀ = 3(10) - 4 = 30 - 4 = 26