Question

Which choice is the simple formula for the nth term of the following arithmetic sequence?

Answer 1

which of the numbers is a part of the sequence 7,3,-1,-5,-9

try plugging in n=1
and see which of the choices gives you a term above

Answer 2

for example
the first choice is 4n+1
enter in n=1 we get 4(1)+1=4+1=5 but 5 is definitely not in that sequence
so choice A is definitely wrong

try choice B which is -4n+11