exam Maths Puzzle Numerical Ability

show that a/(b+c) + b/(c+a) +c/(a+b) > 3/2

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exam Other Question

PAGE NUMBER 320 NUMBERS 11 AND 13 pLEASE AND THANKS VERY MUCH :) For the quadratic equation f(x) 5.64x^2-3.135x-5.79
What is the Minimum Value? What is the x an y intercepts? What is the Y?

For the quadractic equation f(x) 5.79x^2-3.135x-