The first term ot an A.P is
5, the last term is 45 and
sun is 400. Find the number
of terms and common
difference.
Answers
Answered by
1
Step-by-step explanation:
Tn=a+(n-1)d
45=5+(n-1)5
45=5+5n-5
45=5-5+5n
45=0+5n
45divide5=n
9=n
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