alg2/trig
posted by jaz .
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

alg2/trig 
Steve
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.
Respond to this Question
Similar Questions

Algebra 2 Could use help asap
I really am trying to work these problems out on my own. Please help If f(x)=3x^2 g(x)= 1/6+x find the following and give the domain (f+g) (x) (3x^2) + (1/6+x) x is all real numbers and x is not equal to 6 (fg) (x) (3x^2)  (1/6+x) … 
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? 
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? 
calculus
1. Let f be the function that is defined for all real numbers x and that has the following properties. (i) f''(x)=24x18 (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 horizontal … 
maths
As x,y,z ranges over all possible real numbers, what is the minimum value of 3x^2+12y^2+27z^2−4xy−12yz−6xz−8y−24z+100? 
Maths
A sequence {ai}is defined by the recurrence relation an=40−4an−1 with a0=−4. There exists real valued constants r,s and t such that ai=r⋅si+t for all nonnegative integers i. Determine r2+s2+t2. 
Math
The twiceâ€“differentiable function f is defined for all real numbers and satisfies the following conditions: f(0)=3 f′(0)=5 f″(0)=7 a)The function g is given by g(x)=e^ax+f(x) for all real numbers, where a is a constant. … 
math
6/(v5)(v+2) if the rational expression is defined for all real numbers 
Math
Let the function a@b be defined as 3a + 2b for all real numbers a and b. If u and v are real numbers for which u@v =v@u = 20, what is the value of 2u@3v? 
Math
1. Which expression is equivalent to (2)(a+6)?