C-13-Q033mediumsingle_mcqThe nnn-th term of 7+13+19+25+⋯7 + 13 + 19 + 25 + \cdots7+13+19+25+⋯ is —a6n+16n + 16n+1b6n−16n - 16n−1c7n+67n + 67n+6d6n+76n + 76n+7ব্যাখ্যাHere a=7a = 7a=7 and d=6d = 6d=6, giving an=7+(n−1)⋅6=7+6n−6=6n+1a_n = 7 + (n-1)\cdot 6 = 7 + 6n - 6 = 6n + 1an=7+(n−1)⋅6=7+6n−6=6n+1.