Mathematics
Undergraduate
教えて頂きたいです🙇♀️
A=[-1,1],B=Rと置き、写像を
f: R
R
x+2²-2z
と定め
は単射か、 また、全射が答えよ。
そうであるときは証明し、そうでないときは理由を述べよ。
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