HELP

[slender wyvern]

What area does (A U B)’ correpond to

[slender wyvern]

ANDY I NEED HELP PLEASE

[neon galleon]

Idek

I’m assuming it means just B

But I don’t know set notations very well always get mixed up

[slender wyvern]

How about just A U B

[slender wyvern]

Whats up

[neon galleon]

Think it’s A Union B but I still don’t know it

It’s not intersection so it’s like what’s outside maybe

[slender wyvern]

Union just means everything in A and B

[neon galleon]

Ohhh

[slender wyvern]

So basically everything in the circles

[neon galleon]

Got it

So what does B’ mean?

[slender wyvern]

The ‘ means everything not in that

So they are saying everything not in A U B

[quiet ocean]

Or you can say A’ n B’

Same thing

[neon galleon]

Ohh okay

What about the surd question

[quiet ocean]

Ok here’s an example of rationalising

We want to get rid of the surd at the bottom

[neon galleon]

Okay

[quiet ocean]

My multiplying it by itself

[neon galleon]

Got it

[quiet ocean]

Now look at this

Just 1 minute

Any number in front of it we just do the opposite

[neon galleon]

Ohhh

[quiet ocean]

2+root 8 would be multiplied by 2-root 8

Can you apply it to the question now

[neon galleon]

So I would do 1 + root 2 to top and bottom

[quiet ocean]

👍

[neon galleon]

Like multiply that by top and bottom

[quiet ocean]

Correct

[neon galleon]

That makes so much sense thanks

Wait for the Venn diagram q does 17 and 19 go on the outside then

Since it’s not in a and b

[quiet ocean]

Yes

[neon galleon]

Thank you sm

I actually learned a lot today

One more question tho

I get how to do inverse proportion but that threw me off

[quiet ocean]

Ok let’s start with basics

Y=k/rootx

c^4=k/root(c^2)

Have you found k already or is that what your struggling with

?

[neon galleon]

I’m struggling with that

[quiet ocean]

Oh alright

So how can we manipulate the equation to get k by itself

[neon galleon]

Remove the the square root of c

^2

[quiet ocean]

By multiplying on both sides by…..

[neon galleon]

C^2??

[quiet ocean]

Rootc^2

Yes

[neon galleon]

Yh

[quiet ocean]

We end up with this

Now to simply the c part

Do you know other ways to write idk let’s say root 5 but using powers

[neon galleon]

2

No

Uhh

[quiet ocean]

That’s multiplying by itself

[neon galleon]

-1?

[quiet ocean]

Your close tho

No

[neon galleon]

Oh

[quiet ocean]

Having a minus just turns it into a fraction

1/5

[neon galleon]

Ohhh

[quiet ocean]

It’s 1/2

Where the 2

Is the SQUARE root

And the 1 is the power

[neon galleon]

Got it

[quiet ocean]

What do you think 1/3 would be then

5^1/3

[neon galleon]

Cube root

[quiet ocean]

Correct

Now let’s apply this to our question

Do you understand everything so far

[neon galleon]

yh

[quiet ocean]

Ok

Now the thing is we have (c^2)^1/2

Whenever you see things like that

[neon galleon]

Is k c ^5

[quiet ocean]

We multiply the powers

[neon galleon]

Okay

[quiet ocean]

Yeah

Oh am I going too slow?

[neon galleon]

Nah dw it helped me understand but I just noticed it

I’ve done indices before so it wasn’t completely new just not as complex as this

[quiet ocean]

Oh

It gets way more complex

[neon galleon]

😭

So is that just the answer

[quiet ocean]

Not quite

So we found what k is

[neon galleon]

Yh

[quiet ocean]

And we know that y=k/rootx

Substitute k in

[neon galleon]

Yh

[quiet ocean]

And that’s your answer

[neon galleon]

C^4??