# Math Help - Sequence generation #2

1. ## Sequence generation #2

i cant think of an equation that will generate me 2, -4, 6, -8, 10, -12, and so on

the closest ive gotten is 2*n*(-1)^n

but tat gives me opposite of what i want

2. You're nearly there! Tweak the power on the negative one....

3. Originally Posted by Ion
i cant think of an equation that will generate me 2, -4, 6, -8, 10, -12, and so on

the closest ive gotten is 2*n*(-1)^n

but tat gives me opposite of what i want
HI

you are so close

$
2n \cdot (-1)^{n+1}
$