- Find the foci and eccentricity of x^2 + 5y^2=1?

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Find the eccentricity, foci and directrices of the hyperbola 10y^2 - 3x^2 = 30

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Use the quadratic formula to solve
2bx^2 + 4ax + 3c = 0? 30 students, 19 participated in the literature competition, 17 in the maths competition, 8 participated in both. How many didn't participate? What math course talks about finding patterns and infinite sums and products in more specific? Please the whole process of corrosion? A formula for finding the distance between the skew lines? L1: x=x1+a1(t), y=y1+b1(t), z=z1+c1(t)
L2: x=x2+a2(s),y=y2+b2(s), z=z2+c2(s)?

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