20 terms of the ap 12,7,2
Answers
Answered by
0
Answer:
-83
Step-by-step explanation:
a+(n-1)d
a=12
d= -5
n=20
Answered by
0
Answer:
a=12
d=7-12=-5
tn=a+19d
= 12+19×-5
=-83
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