Question

Help quick, please!..

Answer 1

3rd option

Explanation:

just keep value of n as 1, 2, 3, 4..... to get your answer

Answer 2

8, 11, 14, 17

Explanation:

Arithmetic sequence:

To find first four terms, substitute n = 1, 2, 3 and 4 in the given formula and simplify.

`\sf a_n= 3n + 5\\\\ n = 1 \ ; \ a_1 = 3*1 + 5`

= 3 + 5

= 8

`\sf n = 2 \ ; \ a_2 = 3*2 + 5`

= 6 + 5

= 11

`\sf n = 3 \ ; \ a_3 = 3*3 + 5`

= 9 + 5

= 14

`\sf n = 5 \ ; \ a_4 = 3*4 + 5`

= 12 + 5

= 17

The first four terms are: 8, 11, 14, 17