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If e(1) is the eccentricity of the ellip...

If `e_(1)` is the eccentricity of the ellipse `(x^(2))/(16)+(y^(2))/(b^(2))=1` and `e_(2)` is the eccentricity of the hyperbola `(x^(2))/(9)-(y^(2))/(b^(2))=1` and `e_(1)e_(2)=1` then `b^(2)` is equal to= `

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