形容快的四字词语大全

已知函数f(x)满足f(π/4-x)=f(x) f(-x)=-f(x) f(π/3)=1 则f(π/2+x)-f(x)= It was ___ freezing morning when she met ____ Peter who saved her lifeA./,/ B.a,a C.a,the D.the,a为什么第二个空用a,请详解, 6.She was praised for （having saved）the life of the child .(save) 请详解,7.Granny is very ill and she doesn't feel like (eating) anything .(eat)feel like的用法是什么? My hero is a doctor,who save my life when I could have died.In fact,she has saved quite a fewchildren's lives.At the age of five,I was serious ill and my life was in danger.Myparents were all worried if I could recover from the disease,I was lucky en She will tell you which one to____(choose) Her quick ___(act) saved the child's life白色和其他任何一种颜色都搭配得好 用英语怎么说? 已知函数f(x)=1-2sin²x,那么f(x)的周期是什么? 白雪歌送武判官归京 赏析帮忙赏析“忽如一夜春风来,千树万树梨花开”和“瀚海阑干百丈冰,愁云惨淡万里凝”,不要太多, 已知|a-3|+|b+5|=0,求5a+2b的值 优美句子:读书与学习 已知函数f(x)=2 ^x x0,若f(x)=1/4,则x的值为 已知函数f（x）=x-1/|x|,若f（2^x）=2,求x的值 ｛1+a=（1/3）b,2b-5a=1用带入消元接下列方程组 2{(a-2b)b+(3/5a-2b)b}+(a-2b)+(3/5a-2b)要是分解不成把他算出来 (a^3+1/5a^b+3)-1/2(a^2b-6) a☆b=5a+2b-1求(-4)☆(3☆2) 已知函数f(x)=根2asin(x+π/4)+b+a(1)当a=1时,求f(x)的单调递增区间（2）当a 已知函数f（x）=a/a^2-4(a^x-a^-x)第15题第2小题 已知函数f(x)=a^x(a＞0)且f(2)=4求f(x)的解析式 求曲线y=根号2-x的平方 在点（1,1）处的切线方程 给一块木板的两面刷漆时,刷一面有1分钟,必等5分钟漆干后才能刷另一面.那刷完6块这样木板至少要几分钟? 第四题,用二元一次方程解, 必修一数学题已知函数f(x)=x^2-2ax+2,(a为常数)x属于【-1,1】求函数f(x)的最小值 必修一数学（第四题） 六年级寒假新时空的英语答案P12 已知5a+7b=2b-3,如果求a+b的值,应怎样变形?值是多少? 已知（a-2b-3)的平方+（5a+7b-49)的平方＝0,求5a-4b的值．急 Tom was only too pleased to come.如何翻译? 定积分（0-1）e^xdx与定积分（0-1)e^(x^2)dx的大小关系为 两个油漆工给3块同样的木门正、反面刷漆,每面刷好漆需要5分钟,怎样安排刷漆的时间最少?最少是多少分钟 两个油漆工人要给5块同样的木板的正反面刷漆,每面需要2分钟,怎样安排,刷漆时间最短,最短需要几分钟? 两个油漆工要给三块同样的木板正反两面油漆,每面需两分钟,怎样安排油漆的时间最少,最少的时间是多少 比较定积分的大小：∫(0,π/2)xdx,∫(0,π/2)sinxdx其中0是下限,π/2是上限,