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Viktor [21]
3 years ago
6

If g(x)*x+1/x-2 abd h(x)=4-x, what is the value of (g*h) (-3)

Mathematics
1 answer:
kifflom [539]3 years ago
8 0

Answer:

The value of (g*h) (-3)  is =-\frac{112}{3}

Step-by-step explanation:

If g(x) = x+\frac{1}{x}-2 and h(x)=4-x

We have to find (g*h) (-3)

First multiply g(x) with f(x)

(x+\frac{1}{x}-2)\times (4-x)

Distribute\:parentheses

=x\cdot \:4+x\left(-x\right)+\frac{1}{x}\cdot \:4+\frac{1}{x}\left(-x\right)+\left(-2\right)\cdot \:4+\left(-2\right)\left(-x\right)

\mathrm{Apply\:minus-plus\:rules}

+\left(-a\right)=-a,\:\:\left(-a\right)\left(-b\right)=ab

=4x-xx+4\cdot \frac{1}{x}-\frac{1}{x}x-2\cdot \:4+2x

simplify

=-x^2+6x+\frac{4}{x}-9

Now, put x= -3 in above expression

=-(-3)^2+6(-3)+\frac{4}{-3}-9

=\left(-\frac{1}{3}-3-2\right)\left(4+3\right)

=\left(-\frac{16}{3}\right)\left(4+3\right)

=7\left(-\frac{16}{3}\right)

=-\frac{16}{3}\cdot \:7

=-\frac{112}{3}

Therefore, the value of (g*h) (-3) is -\frac{112}{3}

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