Question

Find the sum of the first 5 terms of the sequence 4,2,0

Answer 1

27/4=6 3/4

Explanation:

2^2,2^1,2^0 so the next will be 2^(-1),2^(-2)

the sum will be 4+2+0+1/2+1/4=16/4+8/4+2/4+1/4=27/4

Answer 2

4,2,0,-2,-4,-6,-8,-10 because you subtract 2 each time