ç»å¾æ解å³ã
ç±f(x+2)=f(x)ç¥ï¼f(x)æ¯ä»¥2为å¨æçå¨æå½æ°ãåå 为xå±äº(-1,1]æ¶ï¼f(x)=|x|ï¼ç»åº
f(x)=|x|å¨(-1,1]ä¸çå¾å½¢åï¼åè¿è¡å¨æ延æå°±è¡äºã
ç±äºy1=f(x)ä¸çæ大å¼ç¹ä¸º(1,1),(3,1),(5,1)â¦â¦
å½x=1æ¶ï¼y2=log(7)x=0<y1=1
å½x=2æ¶ï¼y2=log(7)2<y1=1
å½x=3æ¶ï¼y2=log(7)3<y1=1
â¦â¦
å½x=7æ¶ï¼y2=log(7)7=1=y1
æ以å
±æ2ï¼7-1ï¼=12个交ç¹ã
追é®è°¢è°¢å
追çå«å®¢æ°