Answer:
Step-by-step explanation:
Answer:
A. x = 1/4
Step-by-step explanation:
Simplify the equation:
(3x^2+1)/(x-1) + x = 4 + 4/(x-1)
(3x^2+1-4)/(x-1) = 4-x
(3x^2-3)/(x-1) = 4-x
Since (3x^2-3) = 3(x^2-1) and x^2-1 = (x+1)(x-1), substitute 3x^2-3 for 3(x+1)(x-1)
3(x+1)(x-1)/(x-1) = 4-x
Cancel (x-1) from the numerator and denominator:
3(x+1) = 4-x
Isolate x:
3(x+1) = 4-x
3x+3 = 4-x
4x = 1
x = 1/4.
x = 1/4 is the only valid solution unless both sides being undefined would count as a valid equation, then x = 1 would also be valid.
Answer:
No real zeros for the function.
Explanation:
- zero of a function f, if f(r) = 0
<u>solve</u>:
<u>so when f(y) = 0</u>
<u>check</u>:
, 
Inversely proportional means y=k/x, whereas k is constant. hence when y=45,x=20
45=k/20
k=900
ans: y=900/x
