Which of the following sets are empty sets? (a) {x | x is a real number and x^2-1 = 0} (b) {x | x is a real number and x^2+1 = 0} (c) {x | x is a real number and x^2 = -9} (d) {x | x is a real number and x = 2x + 1} (e) {x | x is a real number and x = x + 1}

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A: To check the statement

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A: the algebraic translation of "x is no more than 7 " is ?

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A: Here we will find Interval Notation and Inequality Notation,

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Q: 8. Determine the domain of the function and express in interval notation Ax)

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