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If 4 times the 4th term of an AP is equal to 18 times its 18th term then find its 22nd term.

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If 4 times the 4th term of an AP is equal to 18 times its 18th term then find its 22nd term.

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Let a be the first term and d be the common difference of the AP. Then,

Hence, the 22nd term of the AP is 0.

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