Determine whether various combinations of rational and irrational numbers are rational or irrational themselves.
3390_Proof_sum_of_rational_irrational_is_irrational.html
3389_Proof_product_of_rational_irrational_is_irrational.html
3391_Recognizing_rational_irrational_expressions.html
3388_Proof_sum_product_of_two_rationals_is_rational.html
3392_Recognizing_rational_irrational_expressions_unknowns_.html
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