The Student Room Group

A level maths question

For part a I think that b is just -3 and for c I got 2
For part B i keep getting no value not sure what to do?
(edited 2 years ago)
Do you remember the translation f(x) to f(x-3)? Think about this when finding b and for the answer to part b
Stationary point occurs when (x+b)^2 = 0. When x = -3, what is b?

When you translate a curve n units to the right, what do you replace x with in f(x)?
Using your new function, what is the corresponding value of y for your x? How can you use that to find a?
Original post by Zelerate
Stationary point occurs when (x+b)^2 = 0. When x = -3, what is b?

When you translate a curve n units to the right, what do you replace x with in f(x)?
Using your new function, what is the corresponding value of y for your x? How can you use that to find a?

Is b just not -3
Original post by ExamSeason12
Is b just not -3

Nope :colondollar:
its just 3


Original post by Hellllpppp
Nope :colondollar:
Original post by ExamSeason12
its just 3

Yeah
Original post by Hellllpppp
Yeah

so I tried solving for A and I got -1/18 that looks very wrong
Original post by ExamSeason12
so I tried solving for A and I got -1/18 that looks very wrong

Oh wait their an error in my calculator
Original post by ExamSeason12
Oh wait their an error in my calculator

I got -5/9 for part b is that right?
Original post by ExamSeason12
Oh wait their an error in my calculator

Let me know when you get the answer and we can see if we got the same thing
Original post by ExamSeason12
I got -5/9 for part b is that right?

Not what I got can you post your workings
Original post by Hellllpppp
Not what I got can you post your workings

-18=a(3+3)^2+2
-18=36a+2
-20=36a = -5/9
Original post by ExamSeason12
-18=a(3+3)^2+2
-18=36a+2
-20=36a = -5/9

You’ve forgotten the first step - the translation
Original post by Hellllpppp
You’ve forgotten the first step - the translation

I though it already does the translation for me
Original post by ExamSeason12
I though it already does the translation for me

Part a is about “the curve” and b is about when “the curve is translated”
Original post by Hellllpppp
Part a is about “the curve” and b is about when “the curve is translated”

I the answer -5
Original post by ExamSeason12
I the answer -5

Yes.
na

Original post by Zelerate
Yes.

thank you

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