职高数学题？ 职高超简单数学题
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答案如下
绛旓細濡傚浘鎵绀
绛旓細鍏ㄩ儴绛旀濡傚浘
绛旓細瑕佺敤鍒伴氶」鍏紡锛歯1+(n-1)d鈶狅細2+(n-1)7=2+7n-7=7n-5鈶＄瓑宸暟鍒0锛-7/2...鐨勭n+1椤筪=(-7/2-0)/(2-1)=-7/2an=a1+(n-1)da(n+1)=a1+nda(n+1)=0+(-7/2)na(n+1)=-7n/2 绛夊樊鏁板垪 #閫氶」鍏紡
绛旓細瑙ｏ細杞﹁締杞儙鐨勫懆闀縇=2蟺r=2蟺*0.33鈮2绫 涓鍒嗛挓鍐呰浆杩96鍦堬紝閭ｄ箞涓涓皬鏃惰浆杩囩殑鍦堟暟A=60*96=5760鍦 鈭存昏矾绋婼=A*L=11520绫
绛旓細F(X)=-3*X^2+2X-K+1,鍥犱负浜屾椤圭郴鏁颁负璐燂紝鎵浠ュ紑鍙ｅ悜涓嬶紝鍙F(X)=-3*X^2+2X-K+1鐨勯《鐐瑰皬浜0锛岄偅涔堝嚱鏁颁笌X杞村氨涓嶄細鐩镐氦锛岄《鐐=(4*a*c-b^2)/4*a=[4*(-3)*(-k+1)-2^2]/[4*(-3)]=(4-3k)/3<0,瑙ｅ嚭k>4/3 鏂规硶浜岋細F(X)=-3*X^2+2X-K+1,鍥犱负浜屾椤圭郴鏁...
绛旓細1.(1+30锛壝30/2=465 2.鏈伅=锛1+12脳瀛樻湡骞存暟锛壝楋紙骞村埄鐜嚸楀瓨鏈熷勾鏁帮級/2脳鏈堝瓨閲戦+12脳瀛樻湡骞存暟脳鏈堝瓨閲戦 鎵浠 鏈伅=锛1+12脳1)脳(1.71锛吤1)/2 脳200+12脳1脳200=2422.23 鐭ヨ瘑鎵╁厖:鍒╂伅璁＄畻鍏紡涓 闆跺瓨鏁村彇鍒╂伅璁＄畻鍏紡鏄細鍒╂伅=鏈堝瓨閲戦脳绱鏈堢Н鏁懊楁湀鍒╃巼銆傚叾涓疮璁...
绛旓細f(2)=2/(2a+b)=1 鈭2a+b=2 b=2-2a f(x)=x/(ax+b)=x 鈭(ax+b)x=x 鈭磝=0 鎴朼x+b=1 x=(1-b)/a=1+1/a f(1+1/a)=(1+1/a)/锛籥(1+1/a)+2-2a锛=1+1/a (1+1/a)/锛籥(1+1/a)+2-2a锛=1+1/a 1+1/a=0 a=-1 b=2-2a=4 鎴+1+...
绛旓細a1 = -1锛宒 = 4-(-1) = 5锛岄氶」鍏紡 an = a1+(n-1)d = 5n-6 銆
绛旓細鎬濊矾锛氭眰鍚戦噺鐨棰樼洰锛屽氨鏄敤鏈偣鍧愭爣鍑忓幓濮嬬偣鐨 鍧愭爣銆傝瘉鏄庡悜閲忓拰涓0锛屽彧瑕佹妸鍑犱釜鍚戦噺鐨 鍧愭爣鐩稿姞鍗冲彲銆傝В锛氬悜閲廇B=[4-锛-2锛夛紝1-锛-1锛塢=锛6锛2锛夊悜閲廈C=[锛-1锛-4锛3-1]=锛-5锛2锛夊悜閲廋A=[-2-锛-1锛夛紝-1-3]=锛-1锛-4锛夊悜閲廇B+鍚戦噺BC+鍚戦噺CA= 锛 6+锛-5锛+锛-1锛夛紝...
绛旓細1.宸茬煡闆嗗悎A=锝0,1,2,3锝濓紝鍒橝鐨勫瓙闆嗘湁__16__涓.2.宸茬煡闆嗗悎M=锝涳紙x锛寉锛墊2x+y=2锝濓紝N=锝涳紙x锛寉锛墊x-2y=8锝濓紝閭ｄ箞M鈭㎞=__{()}___.灏辨槸姹傚嚭浜ょ偣锛屼綘鑷繁瑙ｄ竴涓嬫柟绋嬬粍 3.鑻モ淧:瀵逛换鎰忕殑瀹炴暟x锛3x+4锛0鈥濓紝鍒橮锛歘__x>-4/3___4.p锛歺鏄6鐨勫嶆暟锛宷:x鏄2鐨勫嶆暟锛...
