任意m(m<n)个n维向量必线性相关吗?
不是,反了,把n维向量看成列向量,m个n维就组成了n×m矩阵,m<n,不一定线性相关,如果m>n,那么线性相关绛旓細鈶犲綋m<2鏃讹紝|m-2|+|m-3| =-(m-2)-(m-3)=-2m+5锛屸憽褰2鈮鈮3鏃讹紝鍘熷紡=(m-2)-(m-3)=1锛屸憿褰搈>3鏃讹紝鍘熷紡=(m-2)+(m-3)=2m-5銆
绛旓細f(x)=x^2+(m-4)x-m+4 瀵圭О杞磝=-(m-4)/2 褰-(m-4)/2<=-1鏃 鍗砿>=6 鏈灏忓糵(1)=1+m-4-m+4>0 鎭掓垚绔 褰-1<-(m-4)/2<1鏃 鍗2<m<6 鏈灏忓糵(-(m-4)/2)=-1/4m^2+m>0 0<m<4 鈭2<m<4 褰-(m-4)/2>=1鏃 鍗砿<=2鏃 鏈灏忓糵(-1)=1-m+4-m...
绛旓細include <stdio.h> include <stdlib.h> void main( ){ int i,j,r,l,b,d,pl,N;int choose;do { system("cls");printf("\t\t***\n");printf("\t\t*** 1. 闃舵暟閫夋嫨骞舵墦鍗 ***\n");printf("\t\t*** 2. 閫鍑 ***\n");printf("\t\t***...
绛旓細宸查氳繃娴嬭瘯锛屾湜閲囩撼 include <stdio.h> int judge(int n){ int f=1;int i;for(i=2;i<n;i++)if(n%i==0){ f=0;break;} return f;} main(){ int m;int a[30];int flag,i,j=0,t;printf("Input a number:");scanf("%d",&m);flag=judge(m);if(flag==1)printf("The ...
绛旓細閭d箞杩檔涓悜閲忓彲浣滀负涓缁勫熀锛屽叾浠栦换浣昻缁村悜閲忛兘鍙互鏈夎繖缁勫熀绾挎ц〃杈撅紝鍥犺浠绘剰澶氫簬n涓悜閲忕殑n缁村悜閲忕粍涓瀹氱嚎鎬х浉鍏炽備竴鑸嚎鎬т唬鏁版暀鏉愪腑閮芥湁杩欎釜缁撹锛屼絾鍗村緢灏戜細缁欏嚭璇佹槑锛岃繖鏄洜涓哄畠鍙槸鍙﹀涓涓噸瑕佸畾鐞嗭紙鍗冲悜閲忕粍绾挎х浉鍏冲厖瑕佹潯浠讹級鐨勭畝鍗曟帹璁轰箣涓锛宮涓猲缁村悜閲忓繀绾挎х浉鍏宠繖涓粨璁哄嚑涔庢槸鏄剧劧鐨勩
绛旓細鐢遍璁撅紝浠=n=1,鍒欐湁f(1)=f(1)+f(1).鈭磃(1)=0.鍙0锛渕锛渘.鍒檔/m锛1,鈭磃(n/m)锛0.涓鏂归潰锛0=f(1)=f[m脳(1/m)]=f(m)+f(1/m).==>f(1/m)=-f(m).鍙︿竴鏂归潰,0锛瀎(n/m)=f(n)+f(1/m)=f(n)-f(m).===>f(m)锛瀎(n).灏辨槸璇达紝鑻0锛渕锛渘,鍒檉(...
绛旓細濡傛灉鍏充簬x鐨勬柟绋媘x^2-5x=2x^2+4鏄竴鍏冧簩娆℃柟绋嬶紝鍒欐湁锛歮鈮2 鑰屾柟绋媦(y+m-1)-2my+m=1-y鍙寲涓猴細y骞虫柟 +(m-1)y - 2my+y+m-1=0 鍗筹細y骞虫柟-my+m-1=0 鑰冨療螖=(-m)骞虫柟 - 4(m-1)=m骞虫柟 - 4m+4 =(m-2)骞虫柟 鏄撶煡瀵逛簬浠绘剰瀹炴暟m锛坢鈮2锛夛紝閮芥湁锛(m-2)骞虫柟>0鎴愮珛...
绛旓細瑙:1.g(x)=1+m*2^(-x)+4^(-x)=[2^(-x)]^2+2^(-x)+1 浠=2^(-x),鍒檊(x)=t^2+t+1=(t+1/2)^2+3/4 鍥犱负D=(-鏃犵┓,1),鎵浠灞炰簬(1/2,+鏃犵┓),鎵浠(x)灞炰簬(7/4,+鏃犵┓),鍗硘g(x)|>7/4,涓嶅瓨鍦ㄥ摢涓涓M,浣垮緱|g(x)|<=M 鎵浠(x)鍦―涓婁笉鏄湁鐣...
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