[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f1JvVF9YJmrGEpyYHS2QuML65960WWL4xukEY2gHIh_s":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":15,"related":16,"source":20,"type":21},[],"2024-12-05 08:04:31",1002644849,[8,9,10,11],"1.622","1.645","1.690","1.712",{"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）","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",[17,22,30,35,40,45,54,59,64,69],{"answer":18,"createTime":5,"id":6,"options":19,"question":15,"source":20,"type":21},[],[8,9,10,11],"v2",0,{"answer":23,"createTime":5,"id":24,"options":25,"question":28,"source":20,"type":29},[],1002644851,[26,27],"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":31,"createTime":5,"id":32,"options":33,"question":34,"source":20,"type":29},[],1002644858,[26,27],"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":36,"createTime":5,"id":37,"options":38,"question":39,"source":20,"type":29},[],1002644864,[26,27],"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":41,"createTime":5,"id":42,"options":43,"question":44,"source":20,"type":29},[],1002644917,[26,27],"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":46,"createTime":5,"id":47,"options":48,"question":53,"source":20,"type":21},[],1002644929,[49,50,51,52],"0.623","0.629","0.675","0.712","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",{"answer":55,"createTime":5,"id":56,"options":57,"question":58,"source":20,"type":29},[],1002644931,[26,27],"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":20,"type":29},[],1002644942,[26,27],"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":20,"type":29},[],1002644944,[26,27],"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":20,"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]