Answer:
B
Step-by-step explanation:
Step 1: You can test the equations out to see if it gets what you want
A. [tex]a_{n} =-\frac{2}{(1)+2} \\a_{n} = -\frac{2}{3}\\ -\frac{2}{3} =/= 1[/tex]
Therefore we can rule out A
B.[tex]a_{n} =(2(1)-1)^{2} \\a_{n} =(2-1)^{2} \\a_{n} =(1)^{2} \\a_{n} =1 \\[/tex]
B Does give you the right answer but to make sure we want to test one more number
[tex]a_{n} =(2(3)-1)^{2} \\a_{n} =(6-1)^{2} \\a_{n} =(5)^{2} \\a_{n} =25 \\[/tex]
Therefore B is the explicit formula for the sequence
