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解方程4+70%x=102 定义在R上的单调函数f(x)满足f(x+y)=f(x)+f(y) 且f(1)=2 若f(kx)+f(x-2) 英语翻译 函数 (15 16:59:54)已知45° 解方程11%x+x=102 1.September 11,2001 is the day _____we will never forget.A.thatB.whenC.on whichD.on that2.Is this village ___some students visited last year?A.where B.whichC.thatD.the one 1.为什么不是选when 2.为什么不选which 麻烦说明理由!he believe,( ),that people should start as early as possible to look at the world and at the world and atnature and to think about what they saw.A as does his mother B as his mother does C as did his mother D his mother as did 1.It was natural that he ______ the days before going home.A,count B,counted C,had counted D,counts 这3空填啥,英语的! 英语最后3个空怎么填 英语3个空急!急!急! 解方程 5(x-3)^3-40=0 X÷3分之2=5分之2×40解方程快 高一 数学 数学 函数 请详细解答,谢谢! (12 18:49:8)若函数y=ax与y=—b/x在R * 上都是减函数,则y=ax2+bx+c在R * 上是________（填“增”或“减”）函数.已知函数f(x)=根号下(mx2+mx+1 )的定义域是一切实 已知函数f(x)=4x²-kx-8 在[5,20]上具有单调性,求实数k的取值范围 满意悬赏50已知函数f(x)=4x² -kx-8在[5,20]上具有单调性,求实数k的取值范围要具体哦 已知函数f(x)=4x²-kx-8在[5,20]上具有单调性,求实数K的取值范围对称轴为x=k/8在[5,20]上具有单调性,则对称轴需在此区间外,因此有 k/8=20 or k/8=160 or k 己函数f(X)=4X²-kX-8在[5,20]上具有单调性求实数k的取值范围 英语几道填空选择题 几道英语的填空和选择题1.Please p_____ the dying animals.2.The d_____ of learning English is the new words.3.Pigeon always means p_____.4.You'd better do something right a______. 英语选择题和填空1 Many children like to watch "Discovery"and they learn( ) from itA little B much C many D.a lots2 The weather is ( ) fore us to play rugby.A.well enough B.fine enough C.enough well D.enough fine3 keeping a pet at home is ( )A （1）My healthy lifestyle helps me get good grade 对“good grade”提问____ ____ your healthy lifestyle ____ you get （2）He has ____ ideas ____ I .A.same;likeB.different;withC.the same;likeD.the same;as 21-14%X=7.42解方程 3个空(英语) 空着的三道 英语 关于一元二次不等式KX^2 +KX+4≥0的解集为R,求实数K的取值范围 英语3个空求解答 第三空填什么 英语 X*（1+0.8%）+（42-X）*（1+1.1%）=42*（1+1%） 解方程 1÷0.9=(X-1.2)÷3.全面的!） 关于x的不等式（k²-1)x²+(k-1)x-1 一些英语选择题,1.He ___ in our school for 20 years and he __a_ here in 1977.A.has taught; came B.has taught; has come C.taught; came D.has teached; has came2.She _c___ over to me as soon as she caught sight of me.A.is walking B.walks C.walked