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tatiyna
4 years ago
8

What is the discrimination of the quadratic equation 8x^2-2x-1=0

Mathematics
1 answer:
ELEN [110]4 years ago
8 0

D=b^2-4ac\\D=(-2)^2-4(8)(-1)\\D=4+32\\D=36

<em>For another information, when D > 0, there are 2 real roots.</em>

<em>When D = 0, there is only one real root.</em>

<em>And when D < 0, there are no real roots (also known as imaginary.)</em>

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3 years ago
Tenía 5.00 $ que mi mamá me dio 10.00 $, mientras que mi papá me dio 30.00 $ y mi tía y mi tío me dieron 100.00 $ y yo tenía otr
olga2289 [7]

Responder:

<h2>$ 150 </h2>

Explicación paso a paso:

Si inicialmente tengo $ 5 y mi madre me dio $ 10, el dinero total inicial que tengo será $ 5 + $ 10 = $ 15

Si mi papá me dio $ 30, mi tía y mi tío me dan $ 100, el monto recibido de mi tía y mi tío será de $ 30 + $ 100, es decir, $ 130

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3 0
4 years ago
Find the particular solution to y ' = 4sin(x) given the general solution is y = c - 4cos(x) and the initial condition y of pi ov
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The general solutions always have some additive/multiplicative constant, that you must fix in the particular solution.

In order to do so, you need to impose that the particular solution passes through a certain point. In your case, you have

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and you want

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Put everything together, and you have

y\left(\dfrac{\pi}{2}\right) = c-4\cos\left(\dfrac{\pi}{2}\right) = c = 2

Since the cosine is zero in the chosen point. So, we've fixed the value of the constant, and the particular solution is found:

y(x) = 2-4\cos(x)

4 0
3 years ago
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