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# C1 Soloman Paper C question Watch

1. Hey.
Im having trouble doing questions (iii) and (iv).

I was able to do part ii and express in the form (x + a)^2 + b
But i dont understand how to get the translation.
I was only able to do part (iv) by differentiation to find the gradient, then find the formula that way.
Thanks

https://a9497d7f220e174d38d014b2b1d8...20C1%20OCR.pdf
2. (Original post by SamuelN98)
Hey.
Im having trouble doing questions (iii) and (iv).

I was able to do part ii and express in the form (x + a)^2 + b
But i dont understand how to get the translation.
I was only able to do part (iv) by differentiation to find the gradient, then find the formula that way.
Thanks

https://a9497d7f220e174d38d014b2b1d8...20C1%20OCR.pdf
We want to translate to so we basically want the bit in the bracket to change from to .

i.e: if then . What does the translation mean?

For (iv) think about what happens to the tangent.
3. (Original post by thefatone)
Zacken help i have no idea what i'm doing either xD

since you already put in the form (x + a)^2 + b i'm seeing the only difference which i'm seeing between the 2 equation is a -6x , not sure what to say for transformation

tbh i did part 4 by differentiation aswell ^-^
See my post above.
4. (Original post by Zacken)
See my post above.
dammit got ninja'd twice xD
i was gonna ask for help then you quote me xD

ok thanks
5. (Original post by Zacken)
We want to translate to so we basically want the bit in the bracket to change from to .

i.e: if then . What does the translation mean?

For (iv) think about what happens to the tangent.
Thanks.
Does the f(x) for transformation follow a similar rule for stretches in the axis
Is f(2x) a stretch scale factor 1/2 in the x direction?
6. (Original post by SamuelN98)
Thanks.
Does the f(x) for transformation follow a similar rule for stretches.
Is f(2x) a stretch scale factor 1/2 in the x direction?
Yep.

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