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A(0,1) and B(0,-1) are 2 points. If a va...

`A(0,1)` and `B(0,-1)` are `2` points. If a variable point `P` moves such that sum o its distance from `A` and `B` ia `4` Then the locus of `P` is the equation of the form of `x^2/a^2+y^2/b^2=1` find the value of `a^2+b^2`

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