1. Rational comes out even. 2. Irrational 8 square rooted doesn't come out even. 3. Irrational 6 square rooted doesn't come out even. 4. .3 square rooted doesn't come out even.
this is neither a geometric nor an arithmetic sequence
add 4, add 6, add 8
Since you have options, I would guess and check
n=2
2^2+2 =6
3(2)-1 = 5 no
(2+1) (2+2) =12 no
Choice A
So it is basically extended by 75%. 25% of 3.5 is 0.875. 0.875 times 3 is 2.625. That is 3/4 of the segment. Now you have to add it to the 3.5. Your final answer would be 6.125.