急 f(x)=x²-x+3 求 f(1/x) f(x+1)
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急 f(x)=x²-x+3 求 f(1/x) f(x+1)
f(x)=x²-x+3 求 f(1/x) f(x+1)
f(x)=x²-x+3 求 f(1/x) f(x+1)
![急 f(x)=x²-x+3 求 f(1/x) f(x+1)](/uploads/image/z/8460878-14-8.jpg?t=%E6%80%A5+f%EF%BC%88x%EF%BC%89%3Dx%26%23178%3B-x%2B3+%E6%B1%82+f%EF%BC%881%2Fx%EF%BC%89+f%28x%2B1%29)
f(1/x)=(1/x)^2-(1/x)+3
=1/x^2-1/x+3
f(x+1)
=(x+1)^2-(x+1)+3
=x^2+2x+1-x-1+3
=x^2+x+3
=1/x^2-1/x+3
f(x+1)
=(x+1)^2-(x+1)+3
=x^2+2x+1-x-1+3
=x^2+x+3
急 f(x)=x²-x+3 求 f(1/x) f(x+1)
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