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86. a, b care the sides of a rightandang...

86. a, b care the sides of a rightandangled triangle and a circle of radiusr touches the sides of the triangle. If cis the hypotenuse of the triangle,then the value of r is:a + b + C(1)a + b + ca +b-c87. If one zero of the quadraticnolynomial d+ 15x + 6 is reciprocal

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