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lapo4ka [179]
3 years ago
14

98 points possible

Mathematics
2 answers:
Pavel [41]3 years ago
8 0

Answer:

Step-by-step explanation:

symmetry with respect to y-axis for y=f(x) means f(-x)=f(x)

in this case, y = f(x) = x / (x^2+4)

f(-x) = -x / ((-x)^2+4) = -x / (x^2+4) = -f(x)

so it is not symmetric to y-axis

symmetry with respect to x-axis for x=g(y) means g(-y)=g(y)

in this case, y = x / (x^2+4)

y*(x^2+4) = x

y*x^2 + 4y - x = 0

substitute -y into g(y)

(-y)*x^2 +4(-y) - x = 0

-y*x^2 - 4y - x = 0

y*x^2 + 4y + x = 0

so g(-y) is not equal to g(y)

so it is not symmetric to x-axis

drek231 [11]3 years ago
6 0

Answer:

Step-by-step explanation:

I will test it for symmetry with respect to the origin; which means for y=f(x)

f(-x) = -f(x)

f(-x) = -x / ((-x)^2 + 4)

= -x / (x^2 + 4)

= -f(x)

So it is proven that the expression is symmetric to the origin.

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