The first term of an A.P is -7 and common difference is 5 .Find its 18th term and the general term.
Answers
Answered by
5
Answer:
Step-by-step explanation:
a= -7
d=5
t18 =a+(18-1)d (FORMULA=> Tn= a+(n-1)d)
so,
t18 =-7+17*5
= -7+85
= 78
∴the APs 18th term is 78
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Answered by
2
Answer:
18th term is 78
Step-by-step explanation:
a1 = -7
d = 5
n = 18
an = a1 + d(n-1)
an = -7 + 5(18-1)
an = -7 + 5(17)
an = - 7 + 85
an = 78
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