Simplify: 3(6+6i)+i(6+6i)

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tamaranim1 [39]

Answer:

The function is injective but nor surjective

Step-by-step explanation:

We see that:

f(x) = x³

For any x₁ and x₂ ∈ N,

f(x) = x₁³ = x₂³ ⇒ x₁ = x₂, both are natural numbers

It it confirmed one-to-one, hence it is injective

Check the surjectivity:

f(x) = y ∈ N

x³ = y
y = ∛x

Let y = 2, then:

2 = x³
x = ∛2 ∉ N

Since x is not natural, the function is not surjective

6 0

2 years ago

Read 2 more answers

-13x - 8 = 5 - 8x -3

kramer

Answer:

x = -2

Step-by-step explanation:

$-13x - 8 = 5 - 8x - 3 \\\\-13x + 8x = 5 - 3 + 8 \\\\-5x = 10 \\\\x = \frac{-10}{5} = -2$

3 0

3 years ago

Whats the product of the 6th and the 3rd square number

Ivanshal [37]

Answer:

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Step-by-step explanation:

6 0

3 years ago

Father is 20 years older than son. if the sum of their ages is 40 years find their age

sweet-ann [11.9K]

Answer:

20 is the father's 20 is the son

Step-by-step explanation:

20+20=40

40/2=20

40-20=20

another way:

20:n= 40

40-20=20

20:20=40

4 0

3 years ago

Read 2 more answers

What is the circumference of the circle? (use 3.14 for pi) r = 50mm

Alexxandr [17]

Answer:

Step-by-step explanation:

circumference = 2 $\pi$ r

= 2 × 3.14 × 50

= 31.4 mm

hope this helps

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7 0

3 years ago