29.证明:(1)f(x)=(2x^2+2x+3)/(x^2+x+1)==>f(x)≠2
证明f(x)=1-x^2/cosx,证明f(-x)=f(x)
F(X)满足F(x)+2f(x分之1)=3X,求f(x)
已知f(x)满足2f(x)+f(1/x)=3x,求f(x)
已知f(x)满足2f(x)+f(1/x)=3x,求f(x)?
已知f(x)满足2f(x)+f(-x)=-3x+1,求f(x)
证明周期函数f(x + 2) = -f(x)af(x + 2) = 1/f(x)f(x + 3) = -1/f(x)证明
f(x)=x/(x^2+1)
f(x)=x(x-1)(x-2)(x-3)(x-4) f'(1)=?
f(x-1)=x^2-2x+3(x
f(x)=(x-1)(x-2).(x-3)求导
已知f(x+1)+2f(-x)=3x²+x,求f(x)
已知f(x)=x(1/(2^x-1)+1/2).(1)证明f(x)大于0.(2)设F(x)=f(x+t)-f(x-t).