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Sum of n Terms

The first ter...

Question

The first term of an $A P$ is $- 7$ and the common difference $5$ , find its $10 t h$ term.

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Solution

$\begin{matrix} T_{10} = a + (10 - 1) d = - 7 + 9 \times (5) = - 7 + 45 = 38 \end{matrix}$

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