Math, asked by sanglerajesh1973, 11 months ago

if r=1 upon 3,a=9 find t7​

Answers

Answered by MaheswariS
19

\underline{\textsf{Given:}}

\textsf{In a G.P,}

\mathsf{a=9\;and\;r=\dfrac{1}{3}}

\underline{\textsf{To find:}}

\textsf{Seventh term}

\mathsf{i.e\;\;t_7}

\underline{\textsf{Solution:}}

\underline{\textsf{Formula used:}}

\mathsf{The\;n\,th\;term\;of\;the\;G.P\;a,ar,ar^2..........\;is}

\boxed{\mathsf{t_n=a\,r^{n-1}}}

\textsf{Using this formula,}

\mathsf{Seventh\;term\;of\;the\;given\;G.P\;is}

\mathsf{t_7=a\,r^6}

\mathsf{t_7=9(\dfrac{1}{3})^6}

\mathsf{t_7=\dfrac{9}{3^6}}

\mathsf{t_7=\dfrac{3^2}{3^6}}

\mathsf{t_7=\dfrac{1}{3^4}}

\implies\boxed{\mathsf{t_7=\dfrac{1}{81}}}

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