Which of the following is the graph of F(x) =-1/2x'4?

Mathematics

1 answer:

Deffense [45]3 years ago

4 0

Answer:

Step-by-step explanation:

f(x) = -1/2x^4

Because x^4 is being multiplied n=by a negative number, the parabola will face down. That means it is between a and b. To figure out which graph it is, I look at points I could compare.

In graph A, when x=1, y < 1. In graph B, when x=1, y>1.

If i plug x= 1 into f(x), I get:

f(1) = -1/2(1)^4

f(1)=-1/2(1)

f(1)=-1/2

Because f(1) < 1, it is graph A.

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Which expression is the product of (x + 4i)(x − 4i)(x + 4)?

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Answer= x³+4x²+16x+64

Expand the following:(x + 4 i) (x - 4 i) (x + 4)
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-16 i + (-4 i + 4) x + x^2 (4 i + x)
| | | | x | + | 4 i
| | x^2 | + | (4 - 4 i) x | - | 16 i
| | | | (-16 i) x | + | 64
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x^3 | + | (4 i) x^2 | + | 0 | + | 0
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Answer: x^3 + 4 x^2 + 16 x + 64

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AFLATI 2 NUMERE STIIND CA AL DOILEA NUMAR ESTE DE 7 ORI MAI MARE DECITPRIMUL IAR SUMA DINTRE DUBLUL PRIMULUI NUMAR SI TRIPLUL CE

postnew [5]

Answer:

The numbers are 20 and 140

Step-by-step explanation:

The question in English is

Find 2 numbers knowing that the second number is 7 times greater than the first, and the sum between the double of the first number and the triple of the second is 460

Define the variables

Let

x ----> the first number

y ----> the second number

we know that

$y=7x$ -----> equation A