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(D) The $n^{th}$ term of the $A.P.$ is given by $T_n = 3n - 1$.To find the common difference $d$,we calculate the first two terms of the sequence.For

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$ 3 $

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(D) The $n^{th}$ term of the $A.P.$ is given by $T_n = 3n - 1$.To find the common difference $d$,we calculate the first two terms of the sequence.For $n = 1$,$T_1 = 3(1) - 1 = 3 - 1 = 2$.For $n = 2$,$T_2 = 3(2) - 1 = 6 - 1 = 5$.The common difference $d$ is given by $d = T_2 - T_1$.Substituting the values,$d = 5 - 2 = 3$.Alternatively,for an $A.P.$ of the form $T_n = an + b$,the common difference $d$ is equal to the coefficient of $n$,which is $3$.

The $n^{th}$ term of an $A.P.$ is given by $T_n = 3n - 1$. For this $A.P.$,the common difference $d = \ldots$

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