Show that the function f: R→ R given by f(x) = x3 is injective.

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asked Jan 12, 2018 in Mathematics by sforrest072 (157,439 points) 60 409 933
edited Jan 12, 2018 by sforrest072

Show that the function f: R→ R given by f(x) = x3 is injective.

1 Answer

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answered Jan 12, 2018 by mdsamim (213,225 points) 5 10 15
selected Jan 12, 2018 by sforrest072
 
Best answer

However, this will be a contradiction to (1).
∴ x = y
Hence, f is injective.

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