函数问题啊 一个c函数问题
\u51fd\u6570\u7684\u95ee\u9898\u554a\u4f60\u5f97\u5230\u7684\u7ed3\u679c\u662f
f(3^x)=4log2 3^x +233
\u6ce8\u610f\u8fd9\u91cc\u51fd\u6570\u7528\u7684\u53d8\u91cf\u662f3^x
\u628a\u8fd9\u4e2a3^x\u91cd\u65b0\u770b\u4f5cx
\u5f97\u5230\u7684\u5c31\u662ff(x)=4log2 x+233
\u8fd8\u4e0d\u660e\u767d\u5c31\u5148\u8bbe\u4e2a\u4e2d\u95f4\u53d8\u91cft
\u5bf9\u539f\u95ee\u9898\u7684\u56de\u7b54\uff0c\u539f\u6587\u4e2dlw2078\u7684\u56de\u7b54\u57fa\u672c\u6b63\u786e\uff0c\u8fd9\u4e3b\u8981\u662f\u4e00\u4e2a\u53d8\u91cf\u4f5c\u7528\u57df\u7684\u95ee\u9898\u3002
\u4e3a\u8ba8\u8bba\u65b9\u4fbf\u8d77\u89c1\uff0c\u6e90\u7a0b\u5e8f\u6284\u5f55\u4e8e\u4e0b\uff1a\uff08\u6ce8\u91ca\u4e3a\u672c\u4eba\u6240\u52a0\u89e3\u91ca\uff09
int x; //\u5168\u5c40\u53d8\u91cf\uff0c\u4e0d\u59a8\u8bb0\u4e3ax1\uff0c\u56e0\u5168\u5c40\u53d8\u91cf\u662f\u9759\u6001\u53d8\u91cf\uff0c\u6240\u4ee5\u9ed8\u8ba4\u521d\u59cb\u503c\u4e3a0int modifyvalue(){ return(x+=10); } //\u6b64\u5904\u7684x\u4e3ax1int changevalue(int x) //\u5728\u6b64\u5b9a\u4e49\u7684x\uff0c\u4e0d\u59a8\u8bb0\u4e3ax2\uff0c\u56e0\u4e3a\u4e0ex1\u540c\u540d\uff0c\u672c\u51fd\u6570\u5185x1\u4e0d\u8d77\u4f5c\u7528{return(x+=1);} //\u76f8\u5f53\u4e8ereturn x2+=1void main()//\u5728\u6b64\u5b9a\u4e49\u7684x\uff0c\u4e0d\u59a8\u8bb0\u4e3ax3\uff0c\u56e0\u4e3a\u4e0ex1\u540c\u540d\uff0c\u672c\u51fd\u6570\u5185x1\u4e0d\u8d77\u4f5c\u7528{int x=10; //\u76f8\u5f53\u4e8eint x3=10x++; //\u76f8\u5f53\u4e8e x3=10+1=11changevalue(x); //\u76f8\u5f53\u4e8echangevalue(11)\uff0c\u5373x2=11\uff0creturn x2+1\uff08\u8fd4\u56de\u503c\u88ab\u5ffd\u7565\uff09x++; //\u76f8\u5f53\u4e8e x3=11+1=12changevalue(x); //\u8c03\u7528 modifyvalue()\uff0c\u76f8\u5f53\u4e8ex1=x1+10=10printf("First output:%dn",x); //\u76f8\u5f53\u4e8e\u8f93\u51fa x3\uff0c\u537312x++; //\u76f8\u5f53\u4e8e x3=12+1=13changevalue(x);//\u76f8\u5f53\u4e8echangevalue(13)\uff0c\u5373x2=13\uff0creturn x2+1\uff08\u8fd4\u56de\u503c\u88ab\u5ffd\u7565\uff09printf("Second output:%dn",x);//\u76f8\u5f53\u4e8e\u8f93\u51fa x3\uff0c\u537313modifyvalue(); //\u8c03\u7528 modifyvalue()\uff0c\u76f8\u5f53\u4e8ex1=x1+10=20printf("Third output:%dn",x);//\u76f8\u5f53\u4e8e\u8f93\u51fa x3\uff0c\u537313}\u7406\u89e3\u672c\u95ee\u9898\uff0c\u4ee5\u4e0b\u51e0\u70b9\u8981\u6ce8\u610f\uff1a
1. \u8c03\u7528changevalue(x)\u3001modifyvalue()\u4e24\u51fd\u6570\u65f6\uff0c\u6ca1\u6709\u4f7f\u7528\u8fd4\u56de\u503c\uff0c\u5373\u76f8\u5f53\u4e8e\u4e24\u51fd\u6570\u7684return\u6ca1\u6709\u76f4\u63a5\u8d77\u4f5c\u7528\u3002
2. \u5b9a\u4e49changevalue(x)\u51fd\u6570\u65f6\uff0c\u53c2\u6570\u662f\u503c\u4f20\u9001\uff0c\u5728changevalue()\u5185x\u7684\u53d8\u5316\u4e0d\u4f1a\u5f71\u54cd\u5230main\uff08\uff09\u4e2d\u7684x\u3002
3.\u8981\u6ce8\u610f\u53d8\u91cf\u7684\u4f5c\u7528\u57df\uff0c\u5c24\u5176\u662f\u540c\u540d\u53d8\u91cf\u7684\u4f5c\u7528\u57df\u3002
【】【】【】
f(x)=cos（πx/200）的图像
余弦函数图像，振幅为1，周期为400
y=cos(πx/200)
dsfhsajfksfhbcbhehuaqk,DNA,DHKWAFHKAFFF
看着是挺好的
绛旓細f(x)>0鐨勮В闆嗕负(1,3)鍒:浜屾鍑芥暟f(x)蹇呮湁浠ヤ笅鐗圭偣锛氬紑鍙ｅ悜涓嬶紝涓巟杞寸殑浜ょ偣鍒嗗埆鏄(1锛0)銆(3锛0)閭ｄ箞锛屽畠鐨勫绉拌酱鏄細x=2 璁緁(x)鐨勮В鏋愬紡涓猴細y=a(x-1)(x-3)鎶(0,-3)浠ｅ叆寰楋細3a=-3 a=-1 鎵浠ュ嚱鏁扮殑瑙ｆ瀽寮忎负锛歽=-(x-1)(x-3)=-x²+4x-3 鍗筹細y=f(x)=-x&...
绛旓細(1) a=1鏃,f(x)=(x^2)(e^x)璁緁(x)鍦▁=1澶勭殑鍒囩嚎鏂圭▼涓簓=kx 鐢变簬 f'(x)=2x(e^x)+(x^2)(e^x)=(e^x)(x^2+2x)鎵浠'(1)=e(1+2)=3e 浜庢槸k=f'(1)=3e 鏁卆=1鏃,f(x)鍦▁=1澶勭殑鍒囩嚎鏂圭▼涓簓=3ex (2) 鑻(x)鍦ㄥ尯闂(1,2)涓婃湁鏋佸,鍒檉(x)鍦ㄥ尯闂(1,2...
绛旓細锛1锛夎浣鍑芥暟鍊紋闅弜鐨勫澶ц屽澶э紝蹇呴』婊¤冻锛坢+5锛夋槸姝ｆ暟锛屾墍浠瑕佸ぇ浜-5锛岃屽悗闈㈢殑n鍒欏彲浠ユ槸浠讳綍瀹炴暟锛屽畠鍙槸鍐冲畾鏁拌酱鍜屽嚱鏁板浘鍍忕浉浜ょ殑鐐硅屽凡銆備换浣曚竴娆″嚱鏁帮紝鍙婊¤冻x鍓嶇殑绯绘暟鏄鏁帮紝閭ｄ箞鍑芥暟鍊紋灏变細闅弜鐨勫澶ц屽澶с傦紙2锛夐鍏堣绠楀嚭鍑芥暟y=-x+1鍥捐薄鍜屾暟杞翠笂鐨勪氦鐐规槸澶氬皯锛屽垯鏄护Y=0鏃讹紝...
绛旓細1銆佽〃杈惧紡涓 y=kx+b锛坘鈮0锛宬銆乥鍧囦负甯告暟锛夌殑鍑芥暟锛屽彨鍋歽鏄痻鐨勪竴娆″嚱鏁般傚綋k>0鏃讹紝y鐨勫奸殢x鍊肩殑澧炲ぇ鑰屽澶э紱褰搆<0鏃讹紝y鐨勫奸殢x鍊肩殑澧炲ぇ鑰屽噺灏忋傚綋b=0鏃讹紝绉皔涓簒鐨勬姣斾緥鍑芥暟锛屾姣斾緥鍑芥暟鏄竴娆″嚱鏁颁腑鐨勭壒娈婃儏鍐点2銆佸畾涔夊煙锛歊锛涘煎煙锛歊銆傚鍋舵э細濂囧嚱鏁般傚崟璋冩э細褰搆>0鏃讹紝鍥惧儚...
绛旓細鈶 鑳界粨鍚堝浘鍍忓绠鍗曞疄闄闂涓殑鍑芥暟鍏崇郴杩涜鍒嗘瀽銆傦蓟鍙傝渚9锛解懀 鑳界‘瀹氱畝鍗曠殑鏁村紡銆佸垎寮忓拰绠鍗曞疄闄呴棶棰樹腑鐨勫嚱鏁扮殑鑷彉閲忓彇鍊艰寖鍥达紝骞朵細姹傚嚭鍑芥暟鍊 銆傗懁 鑳界敤閫傚綋鐨勫嚱鏁拌〃绀烘硶鍒荤敾鏌愪簺瀹為檯闂涓彉閲忎箣闂寸殑鍏崇郴銆傦蓟鍙傝渚10锛解懃 缁撳悎瀵瑰嚱鏁板叧绯荤殑鍒嗘瀽锛屽皾璇曞鍙橀噺鐨勫彉鍖栬寰嬭繘琛屽垵姝ラ娴嬨傦蓟鍙傝渚11锛...
绛旓細1.瑙ｇ瓟鍦ㄥ浘涓紒锛2.(1)瀵逛簬浠绘剰涓涓偣鐨勬í鍧愭爣x0锛屽畠鍏充簬x=2瀵圭О鐨勭偣妯潗鏍囦负2+(2-x0)=4-x0锛屽彧闇璇佹槑f(x0)=f(4-x0)鍗冲彲銆傚湪绛夊紡f(2+x)=f(2-x)涓彇x=2-x0锛屾垜浠彂鐜拌姹傜殑寮忓瓙灏辫瘉鏄庡嚭鏉ヤ簡锛歠(x0)=f(4-x0)锛屽洜姝鍑芥暟f=f(x)鐨勫浘璞″叧浜庣洿绾縳=2瀵圭О锛(2)褰搙鈭圼0,...
绛旓細a. m=0锛屽嵆f(x)=lg[2x+4]锛屽尯闂翠负[2,4]銆倅=f(x)鍦ㄥ尯闂翠笂鏈夊畾涔夈俠. -2锛渕锛0锛屾鏃秅(x)鏄竴涓互x涓鸿嚜鍙橀噺鍥惧儚寮鍙ｅ悜涓嬬殑浜屾鍑芥暟锛屽垯鍦ㄥ尯闂村唴锛実(x)鐨勬渶灏忓艰惤鍦ㄥ尯闂翠袱涓鐐逛腑鐨勬煇涓涓紝鎵浠ュ彧瑕佸皢涓や釜绔偣甯﹀叆g(x)鐨勮〃杈惧紡锛屽緱鍑虹殑缁撴灉鍏ㄥぇ浜0鍗冲彲銆傚嵆g(m+2)锛0涓攇(2m...
绛旓細1銆鍑芥暟f(x+1)涓紝鍑芥暟鐨勮嚜鍙橀噺鏄痻锛2銆佸嚱鏁癴(x+1)鍦(3,5)涓婂崟璋冮掑锛屽垯婊¤冻3<x<5锛3銆佸凡鐭ュ嚱鏁癴(x+1)鐨勫畾涔夊煙涓(3,5)锛屽垯 3<x<5 4<x+1<6 f(x-1)涓瓁-1婊¤冻锛4<x-1<6 5<x<7 鍗充负锛歠(x-1)鐨勫畾涔夊煙锛岋紙灏辨槸鍏朵腑x鐨勮寖鍥村摝锛...
绛旓細1.f(x)鏄鍑芥暟涓攛鈭(0锛+鈭)涓婁负澧炲嚱鏁帮紝鍒檉(x)鍦(-鈭烇紝0)涔熸槸澧炲嚱鏁般備簬鏄痻路f(x)锛0绛変环浜庯細x>0 锛宖(x)锛0銆鎴杧锛0 锛宖(x)>0銆銆傚洜涓篺(-2)=0锛屾墍浠(2)=0锛屾墍浠>0 锛宖(x)锛0鐨勮В鏄0锛渪锛2锛泋锛0 锛宖(x)>0鐨勮В鏄紞2锛渪锛0銆傚洜姝や笉绛夊紡x路f(x)锛0...
绛旓細鍙互鐢ㄨ瀵熸硶锛屾暣浣撳鍑芥暟锛屽垎姣嶅鍑芥暟锛屽垎瀛愬繀涓哄伓鍑芥暟锛屾棤濂囨暟娆￠」锛屽垯a=-1锛岄夋嫨棰橈紝濉┖灏辫蹇
