DISCOVER PROVE: Combining Rational and Irrational Numbers Is
(a) The sum of a rational number
(b) The product of a nonzero rational number
[Hint: For part (a), suppose that
a)
To prove:
The sum of rational number r and irrational number t is irrational.
Calculation:
Let us assume that the sum of the irrational number t and rational number r is rational number q.
The difference of two rational number gives a rational number.
This is contradiction to the given t is an irrational number.
Therefore, the
b)
To prove:
The product of non-zero rational number r and irrational number t is irrational.