Problem

$-A$ ATTHMETIC PROGRESSIONS
$s_{17}-S_{16}=7$
$\left(a\right)$ $S_{1}$ $\left(b\right)$ $T_{1}$ $\left(c\right)$ $T_{17}$ $\left(d\right)$

10th-13th grade

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Solution

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ARTHME $1$ $1\right)$ $\times 1<\div 1\right)$
$17$ Find the $20$ 20th term from the last-term of the $AP:3,8,13$ 13,..., $253$

10th-13th grade

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