耐心的人来吧、、初一的7道数学题、急、一.填空1.若W=7-(n分之m+1)²,当W有最大值为P时,则2P+m+n的值为___2.三个互不相等的有理数,即可分别表示为1,a+b,a的形式,又可分别表示为0,b分之a,b
MiR-133b inhibits MPP+-induced apoptosis in Parkinson's disease model by inhibiting the ERK1/2 signaling pathway. The aim of this study was to explore the effect of micro ribonucleic acid (miR)-133b on 1-methyl-4-phenylpyridinium ion (MPP+)-induced apoptosis in the Par... L Dong,F ...
利用倍角公式 1 √【(1+cos30)/2】=√(cos15)^2 = cos 15如果是具体答案的话cos 15 = cos(45-30)=cos45*cos30+sin45*sin30=(√6+√2)/42 由tg45=2*tg22.5/(1-tg22.5²) 得tg22.5/(1-tg22.5²)=tg4... 解析看不懂?免费查看同类题视频解析查看解答 相似问题 cos30°怎么计算?