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已知定义在R上的偶函数f(x)满足f(x+1)=-f(x),且当x属于[0,1] 时f(x)=3^x-1,求f(log3

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已知定义在R上的偶函数f(x)满足f(x+1)=-f(x),且当x属于[0,1] 时f(x)=3^x-1,求f(log3为底26)的值
我会,等下, 再答: 用百度输入法的随写输入'给你链接
再答: 有负号吗fx前面
再问: 哪个fx
再答: f(x+1)=这边有符号吗
再问: 有
再答: http://wap.baidu.com/ssid=0/from=0/bd_page_type=1/uid=AAB80009A449B2B851C8B1B3F9B4A3AD/baiduid=1841C1C68F23BC06E24371DB1B2AD257/pu=sz%401320_1001%2Cta%40iphone_2_2.2_3_%2Cusm%400/baiduid=1841C1C68F23BC06E24371DB1B2AD257/w=0_10_%E5%B7%B2%E7%9F%A5%E5%AE%9A%E4%B9%89%E5%9C%A8r%E4%B8%8A%E7%9A%84%E5%81%B6%E5%87%BD%E6%95%B0f%28x%29%E6%BB%A1%E8%B6%B3f%28x%2B1%29%3D-f%28x%29%2C%E4%B8%94%E5%BD%93x%E5%B1%9E%E4%BA%8E%5B0%2C1%5D+%E6%97%B6f%28x%29%3D3%5Ex-1%2C%E6%B1%82f%28log3%E4%B8%BA%E5%BA%9526/t=iphone/l=1/tc?ref=www_iphone&lid=12953467724417498132&order=2&vit=osres&tj=www_normal_2_0_10&waput=1&waplogo=1&cltj=normal_title&dict=-1&sec=31493&di=92b98daff07d3e8f&bdenc=1&nsrc=2YnBLAEptyoA_yixCFOxXnANedT62v3IGtiLPClL0XSxokDyqRLiIMJiEHKhVmaDJlKwdoS_h2lUaSiu0VB9i1F0qqxghXYbiHmwePj5gh7TJ1INhx95_AWTHX2x60eai_i
再答: http://wap.baidu.com/ssid=0/from=0/bd_page_type=1/uid=AAB80009A449B2B851C8B1B3F9B4A3AD/baiduid=1841C1C68F23BC06E24371DB1B2AD257/pu=sz%401320_1001%2Cta%40iphone_2_2.2_3_%2Cusm%400/baiduid=1841C1C68F23BC06E24371DB1B2AD257/w=0_10_%E5%B7%B2%E7%9F%A5%E5%AE%9A%E4%B9%89%E5%9C%A8r%E4%B8%8A%E7%9A%84%E5%81%B6%E5%87%BD%E6%95%B0f%28x%29%E6%BB%A1%E8%B6%B3f%28x%2B1%29%3D-f%28x%29%2C%E4%B8%94%E5%BD%93x%E5%B1%9E%E4%BA%8E%5B0%2C1%5D+%E6%97%B6f%28x%29%3D3%5Ex-1%2C%E6%B1%82f%28log3%E4%B8%BA%E5%BA%9526/t=iphone/l=1/tc?ref=www_iphone&lid=12953467724417498132&order=2&vit=osres&tj=www_normal_2_0_10&waput=1&waplogo=1&cltj=normal_title&dict=-1&sec=31493&di=92b98daff07d3e8f&bdenc=1&nsrc=2YnBLAEptyoA_yixCFOxXnANedT62v3IGtiLPClL0XSxokDyqRLiIMJiEHKhVmaDJlKwdoS_h2lUaSiu0VB9i1F0qqxghXYbiHmwePj5gh7TJ1INhx95_AWTHX2x60eai_i
再答: http://wap.baidu.com/ssid=0/from=0/bd_page_type=1/uid=AAB80009A449B2B851C8B1B3F9B4A3AD/baiduid=1841C1C68F23BC06E24371DB1B2AD257/pu=sz%401320_1001%2Cta%40iphone_2_2.2_3_%2Cusm%400/baiduid=1841C1C68F23BC06E24371DB1B2AD257/w=0_10_%E5%B7%B2%E7%9F%A5%E5%AE%9A%E4%B9%89%E5%9C%A8r%E4%B8%8A%E7%9A%84%E5%81%B6%E5%87%BD%E6%95%B0f%28x%29%E6%BB%A1%E8%B6%B3f%28x%2B1%29%3D-f%28x%29%2C%E4%B8%94%E5%BD%93x%E5%B1%9E%E4%BA%8E%5B0%2C1%5D+%E6%97%B6f%28x%29%3D3%5Ex-1%2C%E6%B1%82f%28log3%E4%B8%BA%E5%BA%9526/t=iphone/l=1/tc?ref=www_iphone&lid=12953467724417498132&order=2&vit=osres&tj=www_normal_2_0_10&waput=1&waplogo=1&cltj=normal_title&dict=-1&sec=31493&di=92b98daff07d3e8f&bdenc=1&nsrc=2YnBLAEptyoA_yixCFOxXnANedT62v3IGtiLPClL0XSxokDyqRLiIMJiEHKhVmaDJlKwdoS_h2lUaSiu0VB9i1F0qqxghXYbiHmwePj5gh7TJ1INhx95_AWTHX2x60eai_i
再答: http://ci.baidu.com/ltUF7Soama
再答: 第一步
再答: http://ci.baidu.com/MKyLqRgSde
再答: 第二步
再答: http://ci.baidu.com/18LEu686Ju
再答: 结束,希望采纳