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PART - 2 CH - 8 Sequences and Series — Maths STD 11 Science — Question

CBSE BoardEnglish MediumSTD 11 ScienceMathsPART - 2 CH - 8 Sequences and Series1 Mark
Question
Find 4th term from the end of the G.P. $3,6,12,24$…......3072.
✓

Answer

4th term from end
\[
\begin{aligned}
a_4 & =l \cdot\left(\frac{1}{r}\right)^{4-1}=3072 \times\left(\frac{1}{2}\right)^{4-1} \\
& =3072 \times \frac{1}{8}=384 \text {}
\end{aligned}
\]

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