Which term of an ap is 70 , if the first term is 120 and the common difference is -5 ?
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Answered by
1
Answer:
11
Step-by-step explanation:
a + (n-1) d
120 + (n-1) -5 = 70
125 - 5n = 70
125 - 70 = 5n
55 = 5n
n = 11
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