exam Maths Puzzle Numerical Ability

Please help me find the intercepts and test for symmetry the equation:
y= (x^2-4)/(2x^4)

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exam Other Question

5 2 8
x y z
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-3
(xy)
Find the values of m and a such that these equations have infinite solution sets.

(i) 4x+my=a
2x+y=4