a. Which term of the AP 27. 24. 21,_____is zero?
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Step-by-step explanation:
a=27
d=-3
an=0
n=?
an=a+(n-1)d
0=27+(n-1)(-3)
-27=-3n+3
-27-3=-3n
-30=-3n
n=10
verification
an=27+(10-1)(-3)
an=27+9(-3)
an=27-27
an=0
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