What is the first term of A.P. if common difference is -5 and 18th term is -68.
Answers
Answered by
6
Answer:
a = 17
Step-by-step explanation:
a18 = -68
d = -5
n = 18
a = ??
an = a + (n - 1) d
-68 = a + (18 - 1) (-5)
-68 = a - 85
a = -68 + 85
a = 17
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Answered by
1
Answer:
a = 17
Step-by-step explanation:
a18 = -68
d = -5
n = 18
a = ??
an = a + (n - 1) d
-68 = a + (18 - 1) (-5)
-68 = a - 85
a = -68 + 85
a = 17
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