Question

Find the next three terms of the sequence 80, –160, 320, –640, . . .

1,280, –2560, 5120

–880, 1040, –880

–640, 1280, –2560

–1280, 2560, –5120

Answer 1

1280, -2560, 5120

Multiply the preceding term by -2 and 

Answer 2

Each term is multiplied by -2 to get the next term.

The next numbers would be 1,280, -2560, and 5120.