88888,IIF(15=86,88888,1/0)

双曲线x^2/144-y^2/b^2=1的两条渐近线互相垂直,那么它的离心率为 用matlab怎么计算多元方程组,最好给个例子, 七下生物第三章人体的呼吸要点总结 英语翻译帮我把这段翻译一下.Lingling went to London Town.She met john ,a little boy.They visited the London Eye.And,saw the city from above the ground.五年级上学期英语书上的. John went to town yesterday and had his computer(repair)_there 求证：关于x的方程x方+（2k+1）x+k-1=0有两个不相等的实数根.请写出具体的解题过程,如有能力,请标明解题思路! when she had finished he momework,she went to townhaving finished her homework.这里的haveing为何不是had这样的用法有什么特定的改法吗 求证：关于x的方程x^2+(2k+1)x+k-1=0有两个不相等的实数根求证：关于x的方程x^2+(2k+1)x+k-1=0有两个不相等的实数根 当k是什么实数时,关于x的方程x^2+(2k+3)x+(k-1)^2=0有两个不相等的实数根?有两个 换元法求值域的具体方法 换元法求值域 She returned to the shop the following morning dressed in a fur coat.为什么用dressed 而不用dressing 或to dress? she returned to the shop dressed in a fur coat dressed前为什么没有be动词为什么分词作状语省去Be 还有那些除了分词也要省略be的 这道题怎么用换元法求值域y=x+根号下（x-3）这道题怎么用换元法做啊 She has short,grey fur.(对has short,grey fur提问) ___ it ___? 淡淡的日子也飘香作文. “淡淡的日子也飘香”作文咋写? 当a=什么是,关于m,n的2元一次方程组m+n=6,m-n-9=3a的解满足2m=n 如何用matlab解下面的矩阵方程(A-B*R^-1*B'*P)'*P1+P1*G=-P*D*F其中：A=[0 1;-1 1];B=[0 1]';P=[3.3784 0.4142; 0.4142 2.6818];G=[0 1 0;0 0 1;-2 -2 -1];F=[1 0 0] 怎么用matlab的ode命令解下面的方程?上述方程我用matlab解后发现数值解和精确解差别较大,求帮助 Matlab方程求解问题.怎么解下面的方程!function F =Komulainen(x,F_aq,F1_aq,F_org,V,A,C,D,a,a1,alfa,beta,x_pls,x_el)% B = (beta*(35.15*x_pls+27.15*x(6)))% Ba = ((beta*(35.15*x_pls+27.15*x(6)))*a)% b = (x(6)-a*x_pls)F = [(F_aq/V)*(x(2)-x(1)) Matlab数值解下面的方程,具体见图：如有建设性思路、想法，或具体的程序一定加分我这样这样画图的：fun_fan.m文件中：function [ fun ] = fun_fan( d,N_eff )lambda_0=1.55e-6;k_0=2.*pi./lambda_0;epsilon_m=-127.8-3. 计算:(-1/2x的三次方)的二次方除以2/5x Tim was a very poor boy ,but now he is very rich .Every dog has its day .(question:“Every dog has its day”翻译成汉语意思是什么?） ___ was very rich,he never helped the poor.A Because B when C if D while 应该是B,C中的一个,是哪个?说错了 B ,D 中的一个. my sister keeps a dog as a p_______.what about you? ____Tom's mother is very poor,____ he loves her so much.A.Although;but B.But;although C./;butD.Althoughl;so .要选哪个? I feel about you is not what it used to be是啥意思呀? I used to chew gum a lot.请问这里,a lot修饰什么?它的用法是什么? 初中军训一般练什么? 要高考了 可是这个In__film Cast Away,Tom Hanks plays__ man named Chuck Noland ——不太懂···第二空为什么不能选the呢?这是高考题 答案只有一个. In the film cast away,Tom Hanks plays __ man named Chuck Noland.这里是填a.还有一题,you are more likely to develop ___ ability to get on well with others.这里是填the.为什么这两题答案不一样呢,后面都是加了限制性定语呀