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Exercise 1.1 · Q7

Q.State whether the following sentence is a statement. Justify your answer. In case it is a statement, state its truth value: x2=xx^2 = x.

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"x2=xx^2=x" contains the free variable xx.

For x=0x=0 or x=1x=1 the equation holds (true), but for, say, x=2x=2, 22=4≠22^2=4\neq2 (false). Because the truth value is not fixed, this is an open sentence, not a statement. …

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