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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 若不等式x²+（k-1）x+4〉0的解集为R,求实数k的取值范围 1 I am sorry to_____ you so muchA terrible B troubleC matter D take2 --Do you feel like _____ any water --No.Thank you .I'am not thirsty/A drink B drinkingc to drink D drinks3 My father was ____ tired after work.A even more B more even C even much D 1、The driver in sisted that he ___ me home though I had told hm that I liked to walkA send B sends C sent D would send2、Please ___ the money and I'm sure they will ____ more than 10000 yuan A add;add up B add up;add up to C add up; add up D add ; 销售一空用英语则么说? 一个英语空 这个怎么回答英语一个空 解方程:2.1(X-0.7)=4.2一定要周末前回答 2（x一1.7）=7.2解方程