百科知识

已知函数f(x)=根号2/2^x+根号2,则f(-5)+f(-4?

2007-02-15 22:42:181***
已知函数f(x)=根号2/2^x+根号2,则f(-5)+f(-4)+f(-3)+f(-2)+f(-1)+f(0)+f(1)+f(2)+f(3)+f(4)+f(5)+f(6)= ______.已知函数f(x)=根号2/2^x+根号2,则f(-5)+f(-4)+f(-3)+f(-2)+f(-1)+f(0)+f(1)+f(2)+f(3)+f(4)+f(5?

最佳回答

  • f(x)=√2/(2^x+√2) f(x+1/2)=√2/(2^x*√2+√2)=1/(2^x+1) f(1/2-x)=√2/(√2/2^x+√2)=1/(1/2^x+1)=2^x/(2^x+1) f(x+1/2)+f(1/2-x)=1 f(0)=f(1/2-1/2) f(1)=f(1/2+1/2) f(0)+f(1)=1 f(-1)=f(1/2-3/2) f(2)=f(1/2+3/2) f(-1)+f(2)=1 ... f(-5)+f(-4)+f(-3)+f(-2)+f(-1)+f(0)+f(1)+f(2)+f(3)+f(4)+f(5)+f(6)=6
    2007-02-15 23:03:55
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