the first term of an ap is -7 and the common difference is 5 find its 18th term and general term
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Answered by
8
Hi mate
Here is ur answer ⬇️⬇️⬇️
a=(-7)
d=5
⏹️a18=a+17d
= (-7) + 17(5)
= -7 + 85
➡️a18=78
⏹️General term = an
⏹️an=a+(n-1)d
= -7 +(n-1)5
= -7+5n-5
➡️an=(-12) + 5n
I hope this will help you....
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Answered by
6
Answer:
a=-7, d=5, n=18
18th term =a+(n-1)d
= -7+17*5
= -7+85
= 78
general term= -7+(n-1)5
= -7+5n-5
= 5n-12
hope this helps
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