Harmonic mean of roots of the equation -5-2-x-2-4-2-x-8-2-2-0 is- options 2-4-6-8

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Monotonically Decreasing Functions

harmonic mean...

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harmonic mean of roots of the equation (5+\sqrt2)x^2-(4+\sqrt2)x+8+2\sqrt2=0 is: options 2,4,6,8

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(5 + \sqrt{2}) x^{2} - (4 + \sqrt{5}) x + 8 + 2 \sqrt{5} = 0

(5 + \sqrt{2}) x^{2} - (4 + \sqrt{5}) x + 8 + 2 \sqrt{5} = 0

\sqrt{2} x^{2} - b x + (8 - 2 \sqrt{5}) = 0

(\sqrt{5} + 2) x^{2} - (4 + \sqrt{5}) x + (8 + 2 \sqrt{5}) = 0

H . M .

a

b

\frac{2 a b}{a + b}

(5 + \sqrt{2}) x^{2} - b x + + (8 + 2 \sqrt{5}) = 0

4

b

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