计算下列各式的值:$\left(1\right)\dfrac{lg3+\dfrac{2}{5}lg9+\dfrac{3}{5}lg\sqrt{27}-lg\sqrt{3}}{lg81-lg27}$;$\left(2\right){\left(lg5\right)}^{2}+lg2\times lg50+{2}^{1+\dfrac{1}{2}{\log }_{2}5}$. 答案 跟踪训练1解(1)解法一:(正用公式)-|||-lg...
$lg2\cdot lg50+\left ( {lg2} \right )^{2}+lg25=lg2⋅ ( (1+lg5) )+ ( (lg2) )^2+2lg5=lg2+lg2⋅ lg5+ ( (lg2) )^2+2lg5=lg2\cdot \left ( {lg2+lg5} \right )+lg2+2lg5=2lg2+2lg5=2\left ( {lg2+lg5} \right )=2\times 1=2$, 综上所述,结论:$lg2\cdot ...
$=lg2+lg5=lg10=1$. 综上所述,答案:$1$ (3)由(log)_2 ( (lgx) )=1,可得$lgx=2$, $\therefore x={10}^{2}=100$. 综上所述,答案:$100$ (4)$\left ( {{log}_{3}2+{log}_{9}2} \right )\cdot \left ( {{log}_{4}3+{log}_{8}3} \right )$ $=\left ( {{log}...
解析 (lg)^25+lg2⋅ lg50 $={lg}^{2}5+lg2\cdot lg(5\times 10)$ $={lg}^{2}5+lg2\cdot (1+lg5)$ $={lg}^{2}5+lg2+lg2\cdot lg5$ $=lg5\cdot lg10+lg2$ $=lg5+lg2$ $=lg10$ $=1$ 综上所述,结论是:${lg}^{2}5+lg2\cdot lg50=1$...
Arabidopsis thaliana‘extra-large GTP-binding protein’ (AtXLG1): a new class of G-protein Plant Mol. Biol., 40 (1999), pp. 55-64 Google Scholar Llorente et al., 2005 F. Llorente, C. Alonso-Blanco, C. Sanchez-Rodriguez, L. Jorda, A. Molina ERECTA receptor-like kinase and heterotri...
锥入度:LG20.1mm 型号:LG2 闪点:LG2(℃) 倾点:LG2(℃) 类别:通用脂 供应商信息 公司地址东莞市塘厦镇振兴围社区塘厦大道79号长埔建材市场J栋123号统一社会信用代码91441900059939960L 组织机构代码05993996-0注册资本10万人民币 营业期限44954-03-25至无固定期限经营状态开业 ...
( 3 )lg500+lg 8 5- 1 2lg64+50 ( (lg2+lg5) )^2相关知识点: 试题来源: 解析 $\left ( {1} \right )$、$2{log}_{3}2-{log}_{3}\dfrac {32} {9}+{log}_{3}8=(log)_34-(log)_3 (32) 9+(log)_38={log}_{3}\left ( {4\times \dfrac {9} {32}\times 8...
1求下列各式的值:(1)log535-log550-log51411)logs 35 10g550logs 14;(2)(lg2)3+(lg5)3+3lg2·lg5;(2)(1g2)3+(lg2),(3)(1-log63)+log62·log618]÷log64.(2)(1g2)3+(lg2), 2求下列各式的值;;;. 3 求下列各式值:1)sin67°30cos67°301)sin67°30;(2)1-2sin275°...
3计算 (lg5)^2+lg2*lg50 的值. 答案 【答案】$1$【解析】${\left(lg5\right)}^{2}+lg2\times lg50$,$={\left(lg5\right)}^{2}+lg2\times \left(lg10+lg5\right)$,$={\left(lg5\right)}^{2}+lg2+\left(lg2\right)\left(lg5\right)$,$=lg5(lg5+lg2)+lg2$,$=1$ 结果二 题...
2.计算下列各式.(1) lg25+lg2⋅lg50+(lg2)^21g3 2-1g9+1 lg√(27)+lg8-lg√(1000)1g0.3-1g 1.2(3) (log_32+1og_92)⋅(log_43+1og_83) . 相关知识点: 试题来源: 解析 (1-c-c+c+c-c)/((-c))=0 (51+)=5+[(+)58I^2+78I(I+58I+78I)=581+781(c81+1)+_c(...