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Which of the following is a reciprocal e...

Which of the following is a reciprocal equation of class one. 1) `2 x^3 + 5 x^2 + 5 x + 2 = 0` 2) `2 x^3 + 5 x^2 + 5 x - 2 = 0` 3) `2 x^3 - 5 x^2 + 5 x - 2 = 0` 4) none of these

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The combined equation of the asymptotes of the hyperbola 2x^2+5x y+2y^2+4x+5y=0 is (a) 2x^2+5x y+2y^2+4x+5y+2=0 (b) 2x^2+5x y+2y^2+4x+5y-2=0 (c) 2x^2+5x y+2y^2=0 (d) none of these

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