Question

1, 6, 11,what will be its 15th term?
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Answer 1

Answer:

71 is your required answer

Answer 2

Answer:

$a = 1 \: \: and \: d = 5 \\ \\ now \: 15th \: term \: is \: = a + 14d \\ \\ = 1 + 14(5) \\ \\ = 1 + 70 \\ \\ = 71. \: (ans)$