The answer is c to your question
It’s r=-2
Just by doing the work to it I got that answer
Negative +Negative = Negative
Negative + Positive = negative
firstly, we have to find the difference
the diff is 6
we apply the concept diN+0
Di is difference
N is n
0 is first term - difference
first term is 3
diff is 6
3-6 = -3
nth term is 6n-3
then, we just substitute which is n is the 36th term
: 6(36)-3 = 213
