七年级下册数学资源与评价第45页答案
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\u8c22\u8c22\u91c7\u7eb3\u6211\u7684\u5efa\u8bae! !
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你把题目给放上去啊烦得很更抠门和嘎嘎嘎嘎嘎嘎个
绛旓細1.浠ｅ叆寰360=20k+b 210=25k+b k=-30 b=960 y=-30x+960 2.S=锛-30x+960锛夛紙x-16锛=銆傘傘3q
绛旓細瀵逛簬y=x²+bx+c 鍥惧儚涓巟杞寸殑涓や釜浜ょ偣鐨勬í鍧愭爣鍒嗗埆涓篨1銆乆2 鍗硏²+bx+c=0鐨勪袱涓牴涓篨1銆乆2 X1=锛-b+鈭氾紙b²-4c锛夛級/2 X2=锛-b-鈭氾紙b²-4c锛夛級/2 瀵逛簬x²+b²x+20=0 X3=锛-b²+鈭氾紙b^4-80锛夛級/2 X4=锛-b²-鈭氾紙b^4-...
绛旓細涓瀹剁數鑺傦紝濡堝涔颁簡涓鍙扮┖璋冭姳浜2400鍏冿紝姣斿師浠蜂究瀹滀簡鍗佷笁鍒嗕箣涓杩欏彴绌鸿皟鍘熶环澶氬皯鍏冿紵瑙ｏ細鍘熶环=2400/(1-1/13)=2400/(12/13)=2600鍏 鐢蹭箼涓ゆ暟淇矾闃熷叡淇簡涓鏉¤矾锛屼箼闃熸瘮鐢查槦灏戜慨150鍗冪背锛岀敳闃熸瘮涔欓槦澶氫慨浜斿垎涔嬩竴杩欐潯璺叡闀垮灏戠背锛熻В锛氫箼淇簡150/(1/5)=750鍗冪背 鐢蹭慨浜750+150=900...
绛旓細璧勬簮涓庤瘎浠锋暟瀛︿竷涓嬬鍏珷绛旀... 璧勬簮涓庤瘎浠锋暟瀛︿竷涓嬬鍏珷绛旀 灞曞紑 鎴戞潵绛 1涓洖绛 #鐑# 宸插濂虫у氨搴旇鎵挎媴瀹堕噷澶ч儴鍒嗗鍔″悧?涓濈綉鍥剧焊 2016-05-15 路 TA鑾峰緱瓒呰繃254涓禐 鐭ラ亾灏忔湁寤烘爲绛斾富 鍥炵瓟閲:340 閲囩撼鐜:0% 甯姪鐨勪汉:53.5涓 鎴戜篃鍘荤瓟棰樿闂釜浜洪〉 鍏虫敞 灞曞紑鍏ㄩ儴 杩介棶 鎴戣...
绛旓細5. 11 鍙潕瀛愮殑閲嶉噺绛変簬2鍙嫻鏋鍜1鍙瀛愮殑閲嶉噺, 2鍙潕瀛愬拰1鍙嫻鏋滅殑閲嶉噺绛変簬1鍙瀛愮殑閲嶉噺, 閭ｄ箞, 涓鍙瀛愮殑閲嶉噺绛変簬___鍙潕瀛愮殑閲嶉噺銆6. A銆丅涓ゆ暟鐨勫拰鏄 , A鏁扮殑 鍊嶄笌B鏁扮殑涓ゅ嶇殑鍜屾槸16, A鏁版槸___銆7. "鍏竴"鐢诲睍鎵鍙傚睍鐨勭敾涓, 14骞呬笉鏄叚骞寸骇鐨, 17骞呬笉鏄簲骞寸骇鐨, 鑰屼簲...
绛旓細鏁板涓璐墿 浼拌璐圭敤锛氣拹璧斾簡锛岃禂16鍏冦傗拺鎶婂皬鐩掑瓙10鍘樼背鐨勯偅鏉℃１锛屽鐫绠卞瓙鐨10鍘樼背鐨勬１鍘绘憜鏀俱傝喘鐗╃瓥鐣ワ細鈷圓銆傗拤鏈澶氫袱绉嶃傗拪鈶翠箼鈶典笝鈶朵笝鈶3绉嶏紝5绉嶃傗拫涔欏簵銆傗拰鐢插簵銆傗拲杩涙磥鐧界墝姣涘肪銆傚寘瑁呯殑瀛﹂棶锛氣拡1176cm2銆傗拤90脳39銆傗拪5000cm2.鈷嬧懘585 cm2銆傗懙110.8cm銆傗拲30cm2銆绗竷鍗曞厓 ...
绛旓細鏁板娲诲姩 灏忕粨 涓冨勾绾т笅鍐锛氱浜旂珷銆鐩镐氦绾夸笌骞宠绾 鈪犮鎬讳綋璁捐 鈪°鏁欐潗鍒嗘瀽 5.1銆鐩镐氦绾 5.2銆骞宠绾垮強鍏跺垽瀹 5.3銆骞宠绾跨殑鎬ц川 5.4銆骞崇Щ 鏁板娲诲姩 灏忕粨 澶嶄範棰5 鈪涔犻瑙ｇ瓟 鈪ｃ鏁欏璁捐鍙傝冩渚 5.1銆鐩镐氦绾匡紙绗1璇炬椂锛5.4銆骞崇Щ锛堢1璇炬椂锛夆叅銆鎷撳睍璧勬簮 鈪ャ璇勪环寤鸿涓庢祴璇曢...
绛旓細鍘熷紡=2^(2m-1)*2^4*2^(3m-3)-2^2m*2^3m =2^(2m-1+4+3m-3)-2^(2m+3m)=2^5m-2^5m =0
绛旓細涓嬮潰鏄垜鏁寸悊鐨勬柊璇炬爣浜烘暀鐗涓冨勾绾т笅鏁板鏁欏璁″垝浠ヤ緵澶у闃呰銆 鏂拌鏍囦汉鏁欑増涓冨勾绾т笅鏁板鏁欏璁″垝(...鍥涖佹暀鏉愬垎鏋 鏈鏈熺殑鏁欏鍐呭鍏辫鍏珷,绗 5 绔:鐩镐氦绾垮拰骞宠绾;绗 6 绔:瀹炴暟;绗 7 绔:骞抽潰...鎻愰珮璇惧爞瀹归噺鍜屾晥鐜,绮捐銆佺簿缁冦佺簿璇,璁ょ湡澶囧ソ姣忎竴鑺傚涔犺銆佹寲鎺樻暀鏉璧勬簮銆佹悳绱㈣冪偣,鍔姏鎵撻犻珮鏁...
绛旓細鏂板崕涔﹀簵鍗栬鏈拰缁冧範鍐
