3 years ago

Please help!! I am struggling on cross-sections

Mathematics

1 answer:

uranmaximum [27]3 years ago

7 0

Answer:

I don’t know the answer I just need some points to ask more questions !!! have a good day !!

Step-by-step explanation:

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$\cos(2x) = \cos(x)$

Solution (1)

$2x = x + 2k\pi$

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for k=0 / for k=1 / for k=-1

x=0 / x=2π / x=-2π

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solution (2)

$2x = - x + 2k\pi$

$2x + x = 2k\pi$

$3x = 2k\pi$

$x = \frac{2k\pi}{3}$

for k=0 / for k=1 / for k=-1

x=0 / x=2π/3 / x=-2π/3

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Note that i'm trying values of K which make the answer belong to our interval;

So our solution which i will represent as a set is;

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2 years ago

If f(x) = 2x+4, which of the following is the inverse of f(x)?

creativ13 [48]

Answer:

${f}^{ - 1} (x)= \frac{x}{2} - 2$

Step-by-step explanation:

The given function is

$f(x) = 2x + 4$ Let

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Interchange x and y.

$x = 2y + 4$

Solve for y,

$x - 4 = 2y$

Divide both sides by 2

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Therefore;

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