Question

Find a28 of the arithmetic sequence given aOA. 242OB.-244OC. 244D.-242Reset Selection1 and d = -9.

Answer 1

`\begin{gathered} a_(28)\text{ with a}_1\text{ and d= - 9 } \\ a_n=\text{ a + \lparen n-1\rparen d} \\ a_(28)=\text{ 1 + \lparen28 -1\rparen\lparen-9\rparen} \\ a_(28)=\text{ 1 + \lparen27\rparen\lparen-9\rparen} \\ a_(28)=\text{ 1 - 243 } \\ a_(28)=\text{ -242} \end{gathered}`

The answer is D) -242