求[tex=7.286x2.643]faddr56uylMRhO/40esWThwhQY/2rS3tQp/9COxGglN90rL1HTVadN9bqABGqYnS[/tex].
举一反三
- 以4,9,1为为插值节点,求\(\sqrt x \)的lagrange的插值多项式 A: \( {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x - 1) + {1 \over {24}}(x - 4)(x - 9)\) B: \( - {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x - 1) + {1 \over {24}}(x - 4)(x - 9)\) C: \( - {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x +1) + {1 \over {24}}(x - 4)(x - 9)\) D: \( - {2 \over {15}}(x - 9)(x - 1) + {3 \over {40}}(x - 4)(x - 1) - {1 \over {24}}(x - 4)(x - 9)\)
- 求[tex=7.286x2.643]obuaY1oW+lnUgJKZSNM2mns/BgATGHzmHmtjw1WKQWK+tNR/ygskvKeexVkO7bjH[/tex]。
- 在化合物[tex=3.143x1.214]v4ZSy342c4rYHJ17K2Seyg==[/tex]的质谱中, [tex=1.0x1.0]/4LSvKfNeQWJ+IvWbbbjdA==[/tex]和[tex=2.286x1.143]6xy5cvv57RhdtLjINMq7Bw==[/tex]峰的相对强度比应为( ) A: 98. 9 : 1. 1 B: 98. 9 : 0. 02 C: 2 : 1 D: 1 : 1 E: 3 : 1
- 选择[tex=0.357x1.0]+eJLelx8thmbkEj/Y0iCOw==[/tex]与[tex=0.571x1.0]CQkpoDeAAI+5FKIfe1wVCA==[/tex],使 1) 1274[tex=0.357x1.0]+eJLelx8thmbkEj/Y0iCOw==[/tex]56[tex=0.571x1.0]CQkpoDeAAI+5FKIfe1wVCA==[/tex]9 成偶排列;2) 1[tex=0.357x1.0]+eJLelx8thmbkEj/Y0iCOw==[/tex]25[tex=0.571x1.0]CQkpoDeAAI+5FKIfe1wVCA==[/tex]4897 成奇排列.
- 设[tex=0.857x1.0]N7iCrOsS+NNEUUlnsYCi1g==[/tex]服从参数为 1 的指数分布,[tex=2.286x1.0]9/9iwGqXp5QMYqkNTltYDNEowzysbRa2vywE4TxIMeI=[/tex],求[tex=2.214x1.357]ocoZdV18P73QTNWKFIScyg==[/tex].