Question

72 +68+64 +....
+40
(Find n=? Sn=?)​

Answer 1

Answer:

i don't know is the answer

Step-by-step explanation:

i + don't+know + is+the+answer

Answer 2

Answer:

a1=72

d=4

an=0

an=a+(n-1)d

0‌‌=72+(n-1)4

0=72+4n-4

0=68+4n

4n=68

n=68/4

n=17