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cdavis379
31.08.2019 •
Mathematics
Find the sum of the terms.
x/x^2+3x+2 + 3/x+1
the numerator of the simplified sum is
a) x+3
b) 3x+6
c) 4x+6
d) 4x+2
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Ответ:
Ответ:
Option (C) is the correct answer.
Step-by-step explanation:
The given equation is as follows.
Taking L.C.M, the equation will become as follows.
Factorize the equation
in the denominator as follows.
=
= x(x+2) + 1(x + 2)
= (x+1)(x+2) ........ (2)
Put the factors in equation (2) in to equation (1), then the equation will become as follows.
=![\frac{x^{2}+x +3x^{2}+9x+6)}{(x+1)(x+2)(x+1)}](/tpl/images/0215/2763/594ac.png)
=![\frac{4x^{2}+10x+6}{(x+1)^{2}(x+2)}](/tpl/images/0215/2763/8fadf.png)
Now, factorize the numerator as follows.
=![\frac{4x^{2}+4x+6x+6}{(x+1)^{2}(x+2)}](/tpl/images/0215/2763/8fe3c.png)
=![\frac{4x(x+1) + 6(x+1)}{(x+1)^{2}(x+2)}](/tpl/images/0215/2763/7663c.png)
=![\frac{(4x+6)(x+1)}{(x+1)^{2}(x+2)}](/tpl/images/0215/2763/214f7.png)
Cancelling (x+1) from both numerator and denominator. Then the equation will be written as follows.
=![\frac{(4x+6)}{(x+1)(x+2)}](/tpl/images/0215/2763/6e9b7.png)
Thus, we can conclude that the numerator of simplified sum is (4x+6).
Ответ:
H