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IgorC [24]
3 years ago
11

Plz show work, NEED HELP FAST PLZ

Mathematics
1 answer:
OLga [1]3 years ago
4 0

Answer:

5. 4        6. 6

Step-by-step explanation:

Number 5

10-2\sqrt{9}

2\sqrt{9}=6

=10-6

Subtract the numbers: 10 - 6 = 4

=4

Number 6

70-\left(\sqrt[3]{64}\right)^3

\left(\sqrt[3]{64}\right)^3=64

=70-64

Subtract the numbers: 70 - 64 = 6

=6

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2 years ago
Let f(x)=ax+b and (fof)(x)=4x+8 find the possible value of a and b and also find f(x)?
hoa [83]

Answer:

\huge\boxed{f(x)=-2x-8\ \text{or}\ f(x)=2x+\dfrac{8}{3}}

Step-by-step explanation:

f(x)=ax+b\\\\(f\circ f)(x)=a(ax+b)+b=a^2x+ab+b\\\\(f\circ f)(x)=4x+8\\\Downarrow\\a^2x+ab+b=4x+8\Rightarrow a^2=4\ \wedge\ ab+b=8\\\\a^2=4\to a=\pm\sqrt4\to a=\pm2\\\\\text{for}\ a=-2:\\-2b+b=8\\-b=8\\\boxed{b=-8}\\\\\text{for}\ a=2:\\2b+b=8\\3b=8\\\boxed{b=\frac{8}{3}}

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