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प्रश्न
If `"a" +1/"a"=2`, find: `"a"^4+1/"a"^4`
योग
उत्तर
`"a"^4+1/"a"^4=("a"^2+1/"a"^2)^2-2`
`=(2)^2-2`
= 4 − 2
= 2
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Important Formula of Expansion
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