$\"\"$

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The arithmetic series $\"\"$ and $\"\"$

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Find the common difference $\"\"$ .

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$\"\"$ .

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Here $\"\"$ , $\"\"$ and $\"\"$ .

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The general form of $\"\"$ -terms of arithmetic series $\"\"$ .

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Substitute $\"\"$ , $\"\"$ and $\"\"$ in the general form.

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$\"\"$

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$\"\"$

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Find the $\"\"$ term.

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$\"\"$

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Substitute $\"\"$ and $\"\"$ in the general form.

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$\"\"$

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$\"\"$ .

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The arithmetic equation is $\"\"$ . $\"\"$

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The arithmetic equation is $\"\"$ .