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If r1,r2,r3,r4r_{1}, r_{2}, r_{3}, r_{4}r1,r2,r3,r4 are the roots of the equation 4x4−3x3−x2+2x−6=04x^{4}-3x^{3}-x^{2}+2x-6=04x4−3x3−x2+2x−6=0, what is the value of 1r1+1r2+1r3+1r4\frac{1}{r_{1}}+\frac{1}{r_{2}}+\frac{1}{r_{3}}+\frac{1}{r_4}r11+r21+r31+r41?
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