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3 years ago

What are the solutions of the equation x6 – 9x3 + 8 = 0? Use u substitution to solve.

1 answer:

4 0

X6 – 9x3 + 8 = 0
let u = x^3
u^2 - 9u + 8 = 0
(u-8)(u-1) = 0
u = 1,8
back substitute
1 = x^3
8 = x^3

<span>x = 1 , 2</span>

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3 years ago

Brigitte is shorter than 5 feet. (Brigitte's height=h). Help please

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3 years ago

Read 2 more answers

What is f(5) if f(1) = 3.2 and f(x + 1) = (f(x))?

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The value of f(5) is 3.2.

Step-by-step explanation:

It is given that f(1) = 3.2 and

$f(x+1)=f(x)$

Substitute x=1 in the above equation.

$f(1+1)=f(1)$

$f(2)=3.2$

Substitute x=2 in the given equation.

$f(2+1)=f(2)$

$f(3)=3.2$

Substitute x=3 in the given equation.

$f(3+1)=f(3)$

$f(4)=3.2$

Substitute x=4 in the given equation.

$f(4+1)=f(4)$

$f(5)=3.2$

Therefore the value of f(5) is 3.2.

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3 years ago

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