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Алюня1
@Алюня1
July 2022
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найдите значение выражения 2x⁴+3x²*y²+y²+y⁴, если известно, что x²+y²=1.
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Checov7400
2(1-у²)²+3(1-у²)у²+у²+у^4=2(1-2у²+у^4)+3у²-3у^4+у²+у^4=
=2-4у²+2у^4+4у²-2у^4=2
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=2-4у²+2у^4+4у²-2у^4=2