Yes that would be correct
A = 6
tn = a + (n - 1)d
t4 = 6 + 3d = 12
3d = 12 - 6 = 6
d = 6/3 = 2
f(n + 1) = f(n) + 2
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232-(59+57+58) = S
232-174 = S
S = 58
Hope this helps!
Answer:

Step-by-step explanation:
has solutions of
and
, which expands to 
Answer: c
Step-by-step explanation: