$\"\"$

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The expression is $\"\"$ .

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Try with some positive values and check whether the equation is true.

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Substitute any positive value for $\"\"$ : say 1.

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$\"\"$ $\"\"$

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Compare the equation, the equation is true for $\"\"$ . $\"\"$

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Substitute any other positive value for $\"\"$ : say 2.

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$\"\"$ $\"\"$

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Compare the equation, the equation is true for $\"\"$ .

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The given equation is true for any positive value of $\"\"$ . $\"\"$

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Try with some negative values and check whether the equation is true.

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Substitute any negative value for $\"\"$ : say $\"\"$ 1.

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$\"\"$ $\"\"$

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Compare the equation, the equation is true for $\"\"$ . $\"\"$

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Substitute any other positive value for $\"\"$ : say $\"\"$ . $\"\"$ $\"\"$

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Compare the equation, the equation is true for $\"\"$ .

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The given equation is true for any negative value of $\"\"$ . $\"\"$

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Substitute $\"\"$ . $\"\"$

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$\"\"$ $\"\"$ (Simplify).

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Compare the equation, the equation is true for $\"\"$ .

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The given equation is true only when $\"\"$ . $\"\"$

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The equation is representing additive identity property. i.e $\"\"$ .

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The equation is always true. $\"\"$

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The equation is always true.