Question

Find the 7th term of the geometric sequence shown below
- 5x^4, 20x^7, -80x^10,..

Answer 1

- 5x^4, 20x^7, -80x^10, 320x^13, -1280x^16, 5120x^19, -20480x^22

Integer scale factor = x-4

Exponent scale factor = +3

Answer = -20,480x^22