# Oh thaat one.

Algebra Level pending

$$f(x)$$ is a polynomial of degree greater than or equal to $$3$$.

When $$f(x)$$ is divided by $$x-1$$, the remainder is $$2$$.

When $$f(x)$$ is divided by $$x-2$$, the remainder is $$1$$.

Find the remainder when $$f(x)$$ is divided by $$(x-1)(x-2)$$.

If the remainder is $$r(x)$$, enter the value of $$r(123)$$.

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