已知函数f(x)是(负无穷大,正无穷大)上的偶函数,若对于x≥0,都有f(x+2)=f(x),且当x属于[0,2)时,f(x)=log以2为底的(x+1),则 f(-2008)+f(2009)的值为( )A.-2 B.-1 C.1 D.2
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![已知函数f(x)是(负无穷大,正无穷大)上的偶函数,若对于x≥0,都有f(x+2)=f(x),且当x属于[0,2)时,f(x)=log以2为底的(x+1),则 f(-2008)+f(2009)的值为( )A.-2 B.-1 C.1 D.2](/uploads/image/z/12663894-30-4.jpg?t=%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0f%28x%29%E6%98%AF%EF%BC%88%E8%B4%9F%E6%97%A0%E7%A9%B7%E5%A4%A7%2C%E6%AD%A3%E6%97%A0%E7%A9%B7%E5%A4%A7%EF%BC%89%E4%B8%8A%E7%9A%84%E5%81%B6%E5%87%BD%E6%95%B0%2C%E8%8B%A5%E5%AF%B9%E4%BA%8Ex%E2%89%A50%2C%E9%83%BD%E6%9C%89f%28x%2B2%29%3Df%28x%29%2C%E4%B8%94%E5%BD%93x%E5%B1%9E%E4%BA%8E%5B0%2C2%29%E6%97%B6%2Cf%28x%29%3Dlog%E4%BB%A52%E4%B8%BA%E5%BA%95%E7%9A%84%EF%BC%88x%2B1%EF%BC%89%2C%E5%88%99+f%28-2008%29%2Bf%282009%29%E7%9A%84%E5%80%BC%E4%B8%BA%EF%BC%88+%EF%BC%89A.-2+B.-1+C.1+D.2)
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