[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fzYQoujubq_DP-tu1wyngjjcGtHSoljtEI3a3zvo18VE":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":15,"related":16,"source":26,"type":27},[],"2024-12-05 08:04:31",1002644929,[8,9,10,11],"0.623","0.629","0.675","0.712",{"courseImg":13,"courseName":14},"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7599edd2b29fde97bd2818297875bdeb.jpg","[共享课]数值计算方法（山东联盟）","取迭代初值为0.8,Newton迭代法解方程f(x)=cos(x)+x^2-1.2=0,迭代2次,得到的根的近似值是多少",[17,28,36,41,46,51,54,59,64,69],{"answer":18,"createTime":5,"id":19,"options":20,"question":25,"source":26,"type":27},[],1002644849,[21,22,23,24],"1.622","1.645","1.690","1.712","exp(x)在区间[0,1]上的1次最佳平方逼近多项式的1次项系数等于","v2",0,{"answer":29,"createTime":5,"id":30,"options":31,"question":34,"source":26,"type":35},[],1002644851,[32,33],"对","错","求解同一个方程组的Jacobi迭代法与G-S迭代法具有相同的收敛性",3,{"answer":37,"createTime":5,"id":38,"options":39,"question":40,"source":26,"type":35},[],1002644858,[32,33],"设迭代矩阵M=[0.8,-0.5;-0.7,0.5],则迭代法x[k+1]=M*x[k-1]+g,k=0,1,2,&hellip;发散",{"answer":42,"createTime":5,"id":43,"options":44,"question":45,"source":26,"type":35},[],1002644864,[32,33],"设向量x与y的无穷范数相等,则存在Householder变换把x变为Hx=y",{"answer":47,"createTime":5,"id":48,"options":49,"question":50,"source":26,"type":35},[],1002644917,[32,33],"共轭梯度法的思想是把求解方程组Ax=b的问题转化为最优化问题即求x'Ax-2b'x的极小值的问题",{"answer":52,"createTime":5,"id":6,"options":53,"question":15,"source":26,"type":27},[],[8,9,10,11],{"answer":55,"createTime":5,"id":56,"options":57,"question":58,"source":26,"type":35},[],1002644931,[32,33],"具有两位有效数字的近似数,其十分位和百分位的数字都是准确的",{"answer":60,"createTime":5,"id":61,"options":62,"question":63,"source":26,"type":35},[],1002644942,[32,33],"设A是n阶矩阵,则可经过不超过n(n-1)\u002F2次Givens变换把矩阵A化为上三角矩阵",{"answer":65,"createTime":5,"id":66,"options":67,"question":68,"source":26,"type":35},[],1002644944,[32,33],"设函数f在区间[a,b]上连续,f(a)f(b)&lt;0,则方程f(x)=0在[a,b]内必有唯一根",{"answer":70,"createTime":5,"id":71,"options":72,"question":77,"source":26,"type":78},[],1002644952,[73,74,75,76],"M的谱半径小于1","M的2范数小于或等于1","M的无穷范数小于1","M是严格对角占优矩阵","求解线性方程组的迭代法x[k+1]=M*x[k-1]+g,k=0,1,2,&hellip;收敛的充分条件有哪些",1]