alg2/trig

Which expression is defined for all real numbers?

a) x + 3/x^2
b) 5/(x + 2)^2
c)4/(x − 2)^2
d)7/x^2 + 3

  1. 0
  2. 1
asked by jaz
  1. any time there is a fraction, the function is undefined when the denominator is zero.

    None of the choices is defined for all real numbers.

    posted by Steve

Respond to this Question

First Name

Your Response

Similar Questions

  1. math

    6/(v-5)(v+2) if the rational expression is defined for all real numbers
  2. Algebra plz check

    Find all numbers for which the rational expression is undefined -12/5y. The rational expression is defined for every real number is this correct?
  3. Math

    1. Which expression is equivalent to (-2)(a+6)? A. -2a+6 B. 2a+12 C. -2a-12*** D. -2a+12 2. To which sets of real numbers does the number -22 belong? Choose all subsets that apply. (There's two right answers) Whole Numbers
  4. calculus

    1. Let f be the function that is defined for all real numbers x and that has the following properties. (i) f''(x)=24x-18 (ii) f'(1)=-6 (iii) f'(2)=0 a. Find each x such that the line tangent to the graph of f at (x, f (x)) is
  5. ALGEBRA

    Suppose that R is the set of real numbers. Let f: R--> R be defined by f(x)= mx+b, where m and b are real numbers and m is nonzero. Prove that f is a bijection.
  6. ALGEBRA

    Suppose that R is the set of real numbers. Let f: R--> R be defined by f(x)= mx+b, where m and b are real numbers and m is nonzero. Prove that f is a bijection.
  7. ALGEBRA

    Suppose that R is the set of real numbers. Let f: R--> R be defined by f(x)= mx+b, where m and b are real numbers and m is nonzero. Prove that f is a bijection.
  8. COLLEGE ALGEBRA

    Suppose that R is the set of real numbers. Let f: R--> R be defined by f(x)= mx+b, where m and b are real numbers and m is nonzero. Prove that f is a bijection.
  9. math 2

    let f and g be two functions defined by: f(x)=x+5, with domain all real numbers; g(x)=2x, with all real numbers. which of the following statement are true for f and g?
  10. Math help Ms. Sue please

    1. Name the subset(s) of real numbers to which the number zero belongs. You can choose more than one answer. Irrational numbers Integers Whole numbers Natural numbers 2. Write an algebraic expression for the word phrase: the

More Similar Questions