Question

Work out the value of the first negative term of the sequence 25 - 3n

Answer 1

-2.

Explanation:

3n must be greater than 25 for the first negative term:

3n > 25

n > 25/3

n > 8 1/3.

So n = 9 and the first negative term is 25 - 3*9

= 25 - 27

= -2.