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nikdorinn [45]
3 years ago
7

Write the quadratic equation that has roots (√3+1)/2 and (√3 -1 )/2, if its coefficient with x^2 is equal to:

Mathematics
1 answer:
Bad White [126]3 years ago
3 0

Answer:

Option a

Step-by-step explanation:

Given that ,

the roots are \frac{\sqrt{3}+1 }{2} and \frac{\sqrt{3}-1 }{2}.

We know that quadratic equation with roots a,b is given by

x^{2} -(a+b)x+a.b=0

a=\frac{\sqrt{3}+1 }{2}

b=\frac{\sqrt{3}-1 }{2}

substituting we get,

x^{2}-\sqrt{3}x+1 =0

Hence we see that coefficient of x^{2} is 1.

Option (a)

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Problem PageQuestion Calcium levels in people are normally distributed with a mean of mg/dL and a standard deviation of mg/dL. I
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Complete Question

The complete question is shown on the first uploaded image

Answer:

The  calcium level that is the borderline between low calcium levels and those not considered low is  c = 8.68

Step-by-step explanation:

From the question we are told that

    The mean is  \mu =  9.5\  mg/dL

     The standard deviation \sigma =  0.5 \ mg/dL

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  Since the calcium level is normally distributed the z-value is  evaluated as

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The critical value for 0.05 from the standard normal distribution table is

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6 0
4 years ago
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