If f(x) = 2x2 +5/(x-2), complete the following statement:

Mathematics

1 answer:

faust18 [17]2 years ago

3 0

For this case we have the following function:

$f (x) = 2x ^ 2 + \frac {5} {x-2}$

By definition, we have that the domain of a function is given by all the values for which the function is defined. The given function is not defined when the denominator is zero.

So:

$x-2 = 0\\x = 2$

Thus, the function is not defined at $x = 2.$

The domain is given by all real numbers except 2.

Answer:

The domain is given by all real numbers except 2.

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I have 3 children. Their ages add up to 21, and when multiplied they equal 75. How old are they?

olganol [36]

So represent the ages as x y and z with each being numbers

x+y+z=21
x times y times z=75
this is really tough for elementary school

one way is to find the factors of 75 or the numbers that add up to 75 and trial and error
use whole numbers becuase this is the world of math so

75=1 times 3 times 5 times 5
possible ages are
3,5,5
1,5,15
1,3,25
add them up

3+5+5=13
1+5+15=21 check
1+3+25=29

their ages are 1, 5 and 15

6 0

2 years ago

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Which are the solutions of x2 = –11x + 4? StartFraction negative 11 minus StartRoot 137 EndRoot Over 2 EndFraction comma StartFr

Marysya12 [62]

Answer:

$x_1=-\frac{11}{2}-\frac{\sqrt{137} }{2}\\\\x_2=-\frac{11}{2}+\frac{\sqrt{137} }{2}$