Which term of AP 3,6,9,12....is 65
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Given, A. P = 3,6,9,12.......,65
a=3
d = 6 - 3 = 3
Tn = 65
tn = a + (n-1)d
65 = 3 + (n - 1) 3
65 = 3 + 3n - 3
65 = 3n
n = 65 /3 = 21 whole 2/3
Answered by
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Answer:
Given AP = 3,6,9,12..... is 65
a=3
d= 6-3=3
Tn = 65
Tn = a +(n-1)d
65 = 3 + (n - 1) 3
65 = 3 + 3n - 3
65= 3n
n= 65/3 = 21 whole 2/3
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