在同一直角坐标系中，画出二次函数y＝2x＋1.y＝2x－1的图像
\u8bf7\u5728\u5750\u6807\u7cfb\u4e2d\u753b\u51fa\u4e8c\u6b21\u51fd\u6570y=x²-2x\u7684\u5927\u81f4\u56fe\u50cf\uff08\u56fe\uff09\u7b54\uff1a\u51fd\u6570\u56fe\u8c61\u89c1\u56fe\u6240\u793a
\u629b\u7269\u7ebfy=x²-2x\u4e0e\u76f4\u7ebfy=1\u7684\u4ea4\u70b9\u6a2a\u5750\u6807\u5c31\u662f\u65b9\u7a0bx²-2x=1\u7684\u89e3
\u6240\u4ee5\uff1ax1\u2248-0.4\uff0cx2\u22482.4
\u7b54\uff1a\u51fd\u6570\u56fe\u8c61\u89c1\u56fe\u6240\u793a
\u629b\u7269\u7ebfy=x²-2x\u4e0e\u76f4\u7ebfy=1\u7684\u4ea4\u70b9\u6a2a\u5750\u6807\u5c31\u662f\u65b9\u7a0bx²-2x=1\u7684\u89e3
\u6240\u4ee5\uff1ax1\u2248-0.4\uff0cx2\u22482.4
绛旓細鍦ㄥ悓涓鐩磋鍧愭爣绯讳腑,鐢诲嚭浜屾鍑鏁皔=2x+1.y=2x-1鐨勫浘鍍 鎴戞潵绛 1涓洖绛 #鐑# 缃戞枃璐ㄩ噺鏄笉鏄笅闄嶄簡?dh5505 2014-11-11 路 TA鑾峰緱瓒呰繃7.2涓囦釜璧 鐭ラ亾澶ф湁鍙负绛斾富 鍥炵瓟閲:2.9涓 閲囩撼鐜:79% 甯姪鐨勪汉:5941涓 鎴戜篃鍘荤瓟棰樿闂釜浜洪〉 鍏虫敞 灞曞紑鍏ㄩ儴 宸茶禐杩 宸茶俯杩< 浣犲杩欎釜...
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绛旓細y = 1/4*(x-1)^2 鐨勫绉拌酱锛歺 = 1锛岄《鐐癸細(1,0)锛泍 = -1/4*(x+2)^2 鐨勫绉拌酱锛歺 = -2锛椤剁偣锛(-2,0)锛
绛旓細鍏跺疄杩欓亾棰樿冪殑鏄嚱鏁扮殑浣嶇疆鍏崇郴 鍏堢敾鍑簓=2x^2 寮澶村悜涓 瀵圭О杞翠负y杞 瀹氱偣涓哄師鐐 y=2x^2+2 灏辨槸璁蹭笂涓涓浘鍍 鍚戜笂骞崇Щ 2涓崟浣 y=2锛坸-1锛塣2 灏辨槸灏嗙涓涓浘鍍 鍚戝彸骞崇Щ涓涓崟浣
绛旓細瑙ｏ細鍦ㄥ悓涓鐩磋鍧愭爣绯鍐,鍑芥暟y=x²鍜寉=x+2 鐨勫浘鍍忓涓嬪浘鎵绀猴細褰搙锛-1鎴杧锛2鏃锛屼簩娆″嚱鏁扮殑鐨勫间竴瀹氬ぇ浜庝竴娆″嚱鏁扮殑鍊.
绛旓細绗2涓嚱鏁板浘鍍忓氨鏄皢绗1涓嚱鏁板浘鍍忓湪X杞翠笂宸︾Щ2涓崟浣
绛旓細2015-09-19 鍒濅腑鏁板棰:鍒嗗埆鍦ㄥ悓涓鐩磋鍧愭爣绯讳腑,鎻忕偣鐢诲嚭涓嬪垪鍚勭粍浜屾鍑鏁... 23 2011-12-13 鍦ㄥ悓涓鐩磋鍧愭爣绯诲唴鐢诲嚭涓嬪垪浜屾鍑芥暟鐨勫浘鍍:Y=1/2 X^2... 13 2014-10-08 鍦ㄥ悓涓鐩磋鍧愭爣绯讳腑,鐢诲嚭涓嬪垪浜屾鍑芥暟鍥惧儚y=1/2x... 4 2012-02-19 鍦ㄥ悓涓鐩磋鍧愭爣绯诲唴鐢诲嚭涓嬪垪浜屾鍑芥暟鍥惧儚 y=1...
绛旓細鐢浜屾鍑鏁扮殑鎬ц川鍙煡 (1)y=1/3x^2+3鐨勬渶灏忓=3,y=1/3x^2-2鐨勬渶灏忓=-2;(2)y=-1/4(x+2)^2鐨勬渶澶у=0,y=-1/4(x-1)^2鐨勬渶澶у=0;(3)y=1/2(x+2)^2-2鐨勬渶灏忓=-2,y=1/2(x-1)^2+2鐨勬渶灏忓=2.
绛旓細鈭垫湁涓涓嚱鏁板浘璞＄粡杩鍧愭爣鍘熺偣锛屸埓a銆乥銆乧涓変釜鏁颁腑鏈変竴涓槸0锛屸埓涓変釜浜屾鍑鏁扮殑鍥捐薄鏈変竴涓槸鐩寸嚎锛屸埓灏忔槑鐢荤殑鍥捐薄涓嶆纭紟
绛旓細锛1锛浜屾鍑鏁扮殑椤剁偣锛屽埄鐢ㄩ《鐐瑰叕寮忓嵆鍙眰寰楋紱锛2锛変簩娆″嚱鏁颁笌x杞寸殑宸︿氦鐐癸紝瑙ｄ簩娆″嚱鏁板嵆鍙緱鍒帮紱锛3锛変簩娆″嚱鏁颁笌x杞寸殑鍙充氦鐐癸紝瑙ｄ簩娆″嚱鏁板嵆鍙緱鍒帮紱锛4锛変簩娆″嚱鏁颁笌y杞寸殑浜ょ偣锛屽嵆x=0鐨勭偣锛涳紙5锛変粠浜屾鍑芥暟涓婂彇浠讳竴鐐癸紝浠诲彇涓x浠ｅ叆鍑芥暟琛ㄨ揪寮忔眰鍑簓锛涘皢涓婅堪浜旂偣鍦ㄧ洿瑙掑潗鏍囩郴鍐鐢诲嚭锛...
