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Most Important Selected Qs for JEE AdvancedMathematicsQuadratic Equation

If ' a ' and ' b ' are two numbers such that a^2+b^2=7 and a^3+b^3=10 , then

Options

  1. Agreatest value of |a+b| is 5
  2. Bgreatest value of (a+b) is 4
  3. Cleast value of (a+b) is 1
  4. Dleast value of |a+b| is 1

Correct answer

D. least value of |a+b| is 1

Step-by-step solution

(a+b)=x , then x^3-21 x+20=0 Which has roots 1,4,-5

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