Which terme of the A. P. 3,8,13,18,................is 78?
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Answer:
answer:75
Step-by-step explanation:
3,8,13,18,
We need to find which term is 78
An=a+(n-1)d
Hence,
an=78
a=3
d=8-3=5
putting these in formula
78=3+(n-1)×5
78-3=(n-1)×5
75=(n-1)×5
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