cos(π/3)cos(π/4)cos(π/5)……=1/2[cos(π/3+π/4)cos(π/5)+cos(π/3-π/4)cos...
由:(1)cosx=∏k≥0(1−4x2π2(2k+1)2)于是log(cosx)=−∑k≥0∑n≥14nx2nn...
按国家浏览2,4,4,5,7,7,8,10,10,11,13,13,14,16,16,17,19,19,20,22,22,23,25,25,26,26,27,27,27-Nonacosafluoro-2,5,8,11,14,17,20,23-octakis(trifluoromethyl)-3,6,9,12,15,18,21,24-octaoxaheptacosanoic acid fluoride国外供应商中国供应商 ...
Synonyms: O=C(NC1=O)C(C2=CN(C3=C2C=CC=C3)CCO4)=C1C(C5=C6C=CC=C5)=CN6CC[C@H]4COS(C)(=O)=O;9H,18H-5,21:12,17-Dimethenodibenzo[e,k]pyrrolo[3,4-h][1,4,13]oxadiazacyclohexadecine-18,20(19H)-dione, 6,7,10,11-tetrahydro-9-[[(methylsulfonyl)oxy]methyl]-, (S)...
Adipic acid bis(4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13,14,14,15,15,16,16,17,17,18,18,19,19,20,20,21,21,22,22,23,23,24,24,25,25,25-pentatetracontafluoro-2-hydroxypentacosyl) ester推荐供应商 建议您优先选择企业会员,我们对企业会员产品有严格审核。
英文名称:3-(4-Octacosenyl)succinic acid 1-hydrogen 4-propyl ester 英文同义词:3-(4-Octacosenyl)succinic acid 1-hydrogen 4-propyl ester CAS号: 分子式:C35H66O4 分子量:550.89614 EINECS号: Mol文件:Mol File 3-(4-Octacosenyl)succinic acid 1-hydrogen 4-propyl ester 信息错误报告 ...
肯定收敛的。因为它的部分积序列单调递减，且有下界0。极限是几我还不知道咋算。
Chemical site Hot Keywords:18162-48-6,872-50-4,Methylene Chloride,naphthalene,THF,Titanium Dioxide 52088-89-8 Basic informationMore.. Product Name:(E,E)-(7-oleoyl-4-oxido-10-oxo-3,5,9-trioxa-4-phosphaheptacos-18-enyl)trimethylammonium 4-oxide ...
MW:492.86006 EINECS: Mol File:Mol File Information Error Report Your Email: Browse by provincePentacosanoic acid 4-octenyl esterSuppliersGlobal suppliers Pentacosanoic acid 4-octenyl esterRecommendSuppliers Recommend You Select Member Companies 1...
85865-91-4 基本信息 更多信息 中文名称:lead bis(tetracosylbenzenesulphonate) 中文同义词: 英文名称:lead bis(tetracosylbenzenesulphonate) 英文同义词:lead bis(tetracosylbenzenesulphonate);Einecs 288-691-7;Benzenesulfonic acid,tetracosyl-, lead(2+) salt (9CI) ...