Find the next three terms of the sequence 5,-10,20,-40

200,-1000,5000

Step-by-step explanation:

First we need to find the common ratio

Take the second term and divide by the first

-10/2 = - 5

To find the 5th term take the 4th term and multiply by the common ratio

-40*-5 = 200

To find the 6th term take the 5th term and multiply by the common ratio

200 * -5 = - 1000

To find the 7th term take the 6th term and multiply by the common ratio

-1000*-5 = 5000

80, - 160, 320

Step-by-step explanation:

5,-10,20,-40

It's a Geometric sequence with:

r = - 10/5 = - 2

-40 * - 2 = 80

80 * - 2 = - 160

-160 * - 2 = 320