A. 4 B. 12 C.7 D.6

34. ͼÐδ°¿Ú£¨Figure£©ÏÔʾÍø¸ñµÄÃüÁîÊÇ£¨ b£© A. axis on B. grid on C. box on D. hold on 35. ÒÑÖªº¯ÊýÎļþÈçÏ£¬Ôòfactor(4)=(c ) function f=factor(n) if n<=1 f=1; else

f=factor(n-1)*n; end

A. 4 B. 12 C. 24 D.48

36. ÔËÐÐÈçϳÌÐòºó, ÃüÁî´°¿Ú£¨command windows£©ÏÔʾµÄ½á¹ûΪ( d) A=[13,-56,78; 25,63,-735; 78,25,563; 1,0,-1]; y=max(max(A))

A. y=564 B.y=9 C.y=-735 D.y=563

37. ÔËÐÐÈçϳÌÐòºó, ÃüÁî´°¿Ú£¨command windows£©ÏÔʾµÄ½á¹ûΪ(c ) x=[4,5,6;1,4,8] y=std(x,0,2)

A. y= 2.1213 0.7071 1.4142 B. 1.5000 0.5000 1.0000 C. 1.0000 D. 0.8165 3.5119

2.8674

38. ÔÚͼÐÎÖ¸¶¨Î»Öüӱê×¢ÃüÁîÊÇ£¨c £© A. title(x,y,¡¯y=sin(x)¡¯); B. xlabel(x,y,¡¯y=sin(x)¡¯); C. text(x,y,¡¯y=sin(x)¡¯); D. legend(x,y,¡¯y=sin(x)¡¯);

39. ÔËÐÐÈçϳÌÐòºó, ÃüÁî´°¿Ú£¨command windows£©ÏÔʾµÄ½á¹ûΪ(b ) x=polyder(conv(poly(2),poly(3))); y=polyval(x,2)

A. 2 -5 B. -1 C.0 D. 1 -5 6 40.ÏÂÁÐÄĸöº¯ÊýΪ²åÖµº¯Êý£¨b £©

A. P=polyfit(X,Y,3) B. Y1=interp1(X,Y,X1,'method')

C. [Y,I]=sort(A,dim) D. R=corrcoef(X)

41. ÔËÐÐÈçϳÌÐòºó, ÃüÁî´°¿Ú£¨command windows£©ÏÔʾµÄ½á¹ûΪ(d ) syms x;

f=x*(sqrt(x^2+1)-x); limit(f,x,inf,¡¯left¡¯) A. 0 B. -1/2 C.0 D. 1/2

42. ÔËÐÐÈçϳÌÐòºó, ÃüÁî´°¿Ú£¨command windows£©ÏÔʾµÄ½á¹ûΪ(b ) X=100:(10*11-9); diff(X)

A. 104 B. 1 C.0 D. 50

43. ÔËÐÐÈçϳÌÐòºó, ÃüÁî´°¿Ú£¨command windows£©ÏÔʾµÄ½á¹ûΪ( b) X=linspace(2,5,4); H=diff(X)

A. 0.75 0.75 0.75 0.75 B.1 1 1 C. 1.5 1.5 D. 2 3 4 5

44. ÔËÐÐÈçϳÌÐòºó, ÃüÁî´°¿Ú£¨command windows£©ÏÔʾµÄ½á¹ûΪ(a ) syms x ; f=sqrt(1+exp(x)); diff(f)

A. 1/2/(1+exp(x))^(1/2)*exp(x) B. sqrt(1+exp(x)) C.1 D.0

45. ÔËÐÐÈçϳÌÐòºó, ÃüÁî´°¿Ú£¨command windows£©ÏÔʾµÄ½á¹ûΪ(d ) n=sym('n');

s1=symsum(1/n^2,n,1,inf) A. 1/n B. pi^2 C.0 D. 1/6*pi^2

46. ÔËÐÐÈçϳÌÐòºó, ÃüÁî´°¿Ú£¨command windows£©ÏÔʾµÄ½á¹ûΪ(c ) format rat; syms x;

int(x*log(1+x),0,1) A. 0.25 B. -1/2 C.1/4 D. 1/2

47.ÏÂÁв»ÊôÓÚÓëÈýά»æͼÏà¹Øº¯ÊýÊÇ(d )

A. meshgrid B. surf C.mesh D. bar

48. ½Ç¶È x=´íÎó!δÕÒµ½ÒýÓÃÔ´¡££¬¼ÆËãÆäÕýÏÒº¯ÊýµÄÔËËãΪ (d)

(A) SIN£¨deg2rad(x)£© (B) SIN(x) (C) sin(x) (D) sin(deg2rad(x)) 49. ÏÂÃæµÄ³ÌÐòÖ´ÐкóarrayµÄֵΪa for k=1:10 if k>6 break; else array(k) = k; end end

(A) array = [1, 2, 3, 4, 5, 6] (B) array = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] (C) array =6 (D) array =10.

50£®i=2; a=2i; b=2*i; c=2*sqrt(-1); ³ÌÐòÖ´Ðкó£»a, b, cµÄÖµ·Ö±ðÊǶàÉÙ£¿c (A)a=4, b=4, c=2.0000i (B)a=4, b=2.0000i, c=2.0000i (C)a=2.0000i, b=4, c=2.0000i (D) a=2.0000i, b=2.0000i, c=2.0000i 51. Çó½â·½³Ìx4-4x3+12x-9 = 0 µÄËùÓнâa (A)1.0000, 3.0000, 1.7321, -1.7321 (B)1.0000, 3.0000, 1.7321i, -1.7321i (C)1.0000i, 3.0000i, 1.7321, -1.7321 (D)-3.0000i, 3.0000i, 1.7321, -1.7321

52¡¢ÔÚÑ­»·½á¹¹ÖÐÌø³öÑ­»·£¬µ«¼ÌÐøÏ´ÎÑ­»·µÄÃüÁîΪ ¡£c (A) return; (B) break ; (C) continue ; (D) keyboad

56. ÓÃroundº¯ÊýËÄÉáÎåÈë¶ÔÊý×é[2.48 6.39 3.93 8.52]È¡Õû£¬½á¹ûΪ c (A) [2 6 3 8] (B) [2 6 4 8] (C) [2 6 4 9] (D) [3 7 4 9]

57. ÒÑÖªa=2:2:8, b=2:5£¬ÏÂÃæµÄÔËËã±í´ïʽÖУ¬³ö´íµÄΪ c (A) a' *b (B) a .*b (C) a*b (D) a-b

±à³Ì¼òÌ⣺

1. ÀûÓÃMATLABÊýÖµÔËË㣬Çó½âÏßÐÔ·½³Ì×é(½«³ÌÐò±£´æΪ£¿£¿£¿.mÎļþ) 2. ÇóÏÂÁÐÁªÁ¢·½³ÌµÄ½â

3x+4y-7z-12w=4 5x-7y+4z+ 2w=-3 x +8z- 5w=9 -6x+5y-2z+10w=-8

ÇóϵÊý¾ØÕóµÄÖÈ£»Çó³ö·½³Ì×éµÄ½â¡£ ½â£º£¨1£© >> a=[3 4 -7 -12 5 -7 4 2 ; 1 0 8 -5; -6 5 -2 10]; c=[4; -3; 9;-8]; b=rank(a) b = 4

£¨2£©>> d=a\\c

d = -1.4841, -0.6816, 0.5337,-1.2429

¼´£º x=-1.4841;y= -0.6816;z= 0.5337;w=-1.2429

3. ±àдMATALAB³ÌÐò£¬Íê³ÉÏÂÁÐÈÎÎñ£¨½«³ÌÐò±£´æΪtest04.mÎļþ£©£º £¨1£©ÔÚÇø¼ä [0,4*pi]ÉϾùÔȵØÈ¡20¸öµã¹¹³ÉÏòÁ¿ £»

£¨2£©·Ö±ð¼ÆË㺯Êýy1=sin(t) Óëy2=2cos(2t) ÔÚÏòÁ¿ t´¦µÄº¯ÊýÖµ£»

£¨3£©ÔÚͬһͼÐδ°¿Ú»æÖÆÇúÏßy1=sin(t) Óëy2=2cos(2t) £¬ÒªÇó y1ÇúÏßΪºÚÉ«µã»­Ïߣ¬y2 ÇúÏßΪºìÉ«ÐéÏßԲȦ£»²¢ÔÚͼÖÐÇ¡µ±Î»Öñê×¢Á½ÌõÇúÏßµÄͼÀý£»¸øͼÐμÓÉϱêÌâ¡°y1 and y2¡±¡£

³ÌÐòÈçÏ£º£¨1£©t=linspace(0,4*pi,20); £¨2£©y1=sin(t); y2=2*cos(2*t);