Program matematika / Mathematics program:
Program (Bahasa Indonesia)
Program (English)
Sumber asli / Authoritative original
Jawaban
J.84.1
.
\(Z(f)=f^{-1}(\{0\})\)
dan
\(\{x\mid f(x)=c\}=f^{-1}(\{c\})\text{;}\)
keduanya tertutup.
in-context