Question

How do you work out a sequence by having the nth term

Answer 1

Answer:

see explanation

Step-by-step explanation:

given $a_{n}$ = 8 - n

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

$a_{1}$ = 8 - 1 = 7

$a_{2}$ = 8 - 2 = 6

$a_{3}$ = 8 - 3 = 5

the first 3 terms are 7, 6, 5

the first negative value will occur when n > 8, that is 9

$a_{9}$ = 8 - 9 = - 1 ← first negative term