Question

what are all the formulas for A.P.

Answer 1

$\underline{\boxed{\bf{\quad Arithmetic \: Progression\quad}}}$
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In a sequence, if the difference between two consecutive terms is same then the sequence is known as an A.P.
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The first term is known as " a " .

The common difference is known as " d " .

The 'nth term' is given by : $\Large\sf\red{\underline{\fbox{\green{a_n = [a + (n - 1)d]}}}}$

The sum of 'n' terms is given by : $\Large\sf\red{\underline{\fbox{\green{S_n = \frac{n}{2} [2a + (n - 1)d]}}}}$
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