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受欢迎的 代数 >

展开 (7-\sqrt[5]{x/(96889010407)})^{20}

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解答

展开 (7−596889010407x​​)20

解答

720−596889010407​719⋅205x​​+718⋅190(596889010407x​​)2−717⋅1140(596889010407x​​)3+716⋅4845(596889010407x​​)4−759696x+271320x596889010407x​​−5968890104072​77520x5x2​​+75968890104073​125970x5x3​​−495968890104074​167960x5x4​​+968890104072⋅36288001.89383E20x2​−968890104072403271960524013​5x11​​+9688901040725968890104072​726191981970x25x2​​−9688901040725968890104073​63841053360x25x3​​+9688901040725968890104074​4560075240x25x4​​−968890104073260575728x3​+96889010407333915549​5x16​​−9688901040735968890104072​391020x35x2​​+9688901040735968890104073​9310x35x3​​−9688901040735968890104074​140x35x4​​+968890104074x4​
求解步骤
(7−596889010407x​​)20
使用二项式定理: (a+b)n=i=0∑n​(in​)a(n−i)bia=7,b=−596889010407x​​
=i=0∑20​(i20​)⋅7(20−i)(−596889010407x​​)i
展开求和
=0!(20−0)!20!​⋅720(−596889010407x​​)0+1!(20−1)!20!​⋅719(−596889010407x​​)1+2!(20−2)!20!​⋅718(−596889010407x​​)2+3!(20−3)!20!​⋅717(−596889010407x​​)3+4!(20−4)!20!​⋅716(−596889010407x​​)4+5!(20−5)!20!​⋅715(−596889010407x​​)5+6!(20−6)!20!​⋅714(−596889010407x​​)6+7!(20−7)!20!​⋅713(−596889010407x​​)7+8!(20−8)!20!​⋅712(−596889010407x​​)8+9!(20−9)!20!​⋅711(−596889010407x​​)9+10!(20−10)!20!​⋅710(−596889010407x​​)10+11!(20−11)!20!​⋅79(−596889010407x​​)11+12!(20−12)!20!​⋅78(−596889010407x​​)12+13!(20−13)!20!​⋅77(−596889010407x​​)13+14!(20−14)!20!​⋅76(−596889010407x​​)14+15!(20−15)!20!​⋅75(−596889010407x​​)15+16!(20−16)!20!​⋅74(−596889010407x​​)16+17!(20−17)!20!​⋅73(−596889010407x​​)17+18!(20−18)!20!​⋅72(−596889010407x​​)18+19!(20−19)!20!​⋅71(−596889010407x​​)19+20!(20−20)!20!​⋅70(−596889010407x​​)20
化简 0!(20−0)!20!​⋅720(−596889010407x​​)0:720
化简 1!(20−1)!20!​⋅719(−596889010407x​​)1:−596889010407​719⋅205x​​
化简 2!(20−2)!20!​⋅718(−596889010407x​​)2:718⋅190(596889010407x​​)2
化简 3!(20−3)!20!​⋅717(−596889010407x​​)3:−717⋅1140(596889010407x​​)3
化简 4!(20−4)!20!​⋅716(−596889010407x​​)4:716⋅4845(596889010407x​​)4
化简 5!(20−5)!20!​⋅715(−596889010407x​​)5:−96889010407715⋅15504x​
化简 6!(20−6)!20!​⋅714(−596889010407x​​)6:714⋅38760(596889010407x​​)6
化简 7!(20−7)!20!​⋅713(−596889010407x​​)7:−713⋅77520(596889010407x​​)7
化简 8!(20−8)!20!​⋅712(−596889010407x​​)8:712⋅125970(596889010407x​​)8
化简 9!(20−9)!20!​⋅711(−596889010407x​​)9:−711⋅167960(596889010407x​​)9
化简 10!(20−10)!20!​⋅710(−596889010407x​​)10:968890104072⋅36288001.89383E20x2​
化简 11!(20−11)!20!​⋅79(−596889010407x​​)11:−6777791831720(596889010407x​​)11
化简 12!(20−12)!20!​⋅78(−596889010407x​​)12:726191981970(596889010407x​​)12
化简 13!(20−13)!20!​⋅77(−596889010407x​​)13:−63841053360(596889010407x​​)13
化简 14!(20−14)!20!​⋅76(−596889010407x​​)14:4560075240(596889010407x​​)14
化简 15!(20−15)!20!​⋅75(−596889010407x​​)15:−968890104073260575728x3​
化简 16!(20−16)!20!​⋅74(−596889010407x​​)16:11632845(596889010407x​​)16
化简 17!(20−17)!20!​⋅73(−596889010407x​​)17:−391020(596889010407x​​)17
化简 18!(20−18)!20!​⋅72(−596889010407x​​)18:9310(596889010407x​​)18
化简 19!(20−19)!20!​⋅71(−596889010407x​​)19:−140(596889010407x​​)19
化简 20!(20−20)!20!​⋅70(−596889010407x​​)20:968890104074x4​
=720−596889010407​719⋅205x​​+718⋅190(596889010407x​​)2−717⋅1140(596889010407x​​)3+716⋅4845(596889010407x​​)4−96889010407715⋅15504x​+714⋅38760(596889010407x​​)6−713⋅77520(596889010407x​​)7+712⋅125970(596889010407x​​)8−711⋅167960(596889010407x​​)9+968890104072⋅36288001.89383E20x2​−6777791831720(596889010407x​​)11+726191981970(596889010407x​​)12−63841053360(596889010407x​​)13+4560075240(596889010407x​​)14−968890104073260575728x3​+11632845(596889010407x​​)16−391020(596889010407x​​)17+9310(596889010407x​​)18−140(596889010407x​​)19+968890104074x4​
化简 720−596889010407​719⋅205x​​+718⋅190(596889010407x​​)2−717⋅1140(596889010407x​​)3+716⋅4845(596889010407x​​)4−96889010407715⋅15504x​+714⋅38760(596889010407x​​)6−713⋅77520(596889010407x​​)7+712⋅125970(596889010407x​​)8−711⋅167960(596889010407x​​)9+968890104072⋅36288001.89383E20x2​−6777791831720(596889010407x​​)11+726191981970(596889010407x​​)12−63841053360(596889010407x​​)13+4560075240(596889010407x​​)14−968890104073260575728x3​+11632845(596889010407x​​)16−391020(596889010407x​​)17+9310(596889010407x​​)18−140(596889010407x​​)19+968890104074x4​:720−596889010407​719⋅205x​​+718⋅190(596889010407x​​)2−717⋅1140(596889010407x​​)3+716⋅4845(596889010407x​​)4−759696x+271320x596889010407x​​−5968890104072​77520x5x2​​+75968890104073​125970x5x3​​−495968890104074​167960x5x4​​+968890104072⋅36288001.89383E20x2​−968890104072403271960⋅240153​x511​​+9688901040725968890104072​726191981970x25x2​​−9688901040725968890104073​63841053360x25x3​​+9688901040725968890104074​4560075240x25x4​​−968890104073260575728x3​+96889010407333915549​x516​​−9688901040735968890104072​391020x35x2​​+9688901040735968890104073​9310x35x3​​−9688901040735968890104074​140x35x4​​+968890104074x4​
=720−596889010407​719⋅205x​​+718⋅190(596889010407x​​)2−717⋅1140(596889010407x​​)3+716⋅4845(596889010407x​​)4−759696x+271320x596889010407x​​−5968890104072​77520x5x2​​+75968890104073​125970x5x3​​−495968890104074​167960x5x4​​+968890104072⋅36288001.89383E20x2​−968890104072403271960⋅240153​x511​​+9688901040725968890104072​726191981970x25x2​​−9688901040725968890104073​63841053360x25x3​​+9688901040725968890104074​4560075240x25x4​​−968890104073260575728x3​+96889010407333915549​x516​​−9688901040735968890104072​391020x35x2​​+9688901040735968890104073​9310x35x3​​−9688901040735968890104074​140x35x4​​+968890104074x4​
化简 720−596889010407​719⋅205x​​+718⋅190(596889010407x​​)2−717⋅1140(596889010407x​​)3+716⋅4845(596889010407x​​)4−759696x+271320x596889010407x​​−5968890104072​77520x5x2​​+75968890104073​125970x5x3​​−495968890104074​167960x5x4​​+968890104072⋅36288001.89383E20x2​−968890104072403271960⋅240153​x511​​+9688901040725968890104072​726191981970x25x2​​−9688901040725968890104073​63841053360x25x3​​+9688901040725968890104074​4560075240x25x4​​−968890104073260575728x3​+96889010407333915549​x516​​−9688901040735968890104072​391020x35x2​​+9688901040735968890104073​9310x35x3​​−9688901040735968890104074​140x35x4​​+968890104074x4​:720−596889010407​719⋅205x​​+718⋅190(596889010407x​​)2−717⋅1140(596889010407x​​)3+716⋅4845(596889010407x​​)4−759696x+271320x596889010407x​​−5968890104072​77520x5x2​​+75968890104073​125970x5x3​​−495968890104074​167960x5x4​​+968890104072⋅36288001.89383E20x2​−968890104072403271960524013​5x11​​+9688901040725968890104072​726191981970x25x2​​−9688901040725968890104073​63841053360x25x3​​+9688901040725968890104074​4560075240x25x4​​−968890104073260575728x3​+96889010407333915549​5x16​​−9688901040735968890104072​391020x35x2​​+9688901040735968890104073​9310x35x3​​−9688901040735968890104074​140x35x4​​+968890104074x4​
=720−596889010407​719⋅205x​​+718⋅190(596889010407x​​)2−717⋅1140(596889010407x​​)3+716⋅4845(596889010407x​​)4−759696x+271320x596889010407x​​−5968890104072​77520x5x2​​+75968890104073​125970x5x3​​−495968890104074​167960x5x4​​+968890104072⋅36288001.89383E20x2​−968890104072403271960524013​5x11​​+9688901040725968890104072​726191981970x25x2​​−9688901040725968890104073​63841053360x25x3​​+9688901040725968890104074​4560075240x25x4​​−968890104073260575728x3​+96889010407333915549​5x16​​−9688901040735968890104072​391020x35x2​​+9688901040735968890104073​9310x35x3​​−9688901040735968890104074​140x35x4​​+968890104074x4​

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