101. DISCUSS: Algebraic Errors The left-hand column of the table lists some common algebraic errors. In each case, give an example using numbers that shows that the formula is not valid. An example of this type, which shows that a state- ment is false, is called a counterexample. Algebraic errors Counterexample 1 1 Iy 1 ba + b 2 2 2 + 2 (a + b)?= a? + b? Vat + ba + b a + by a V! a + bAb a a"

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