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# edexcel c1 differentiation

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1. Do you have to include the zero when you differentiation a number

as in

y = 3x +2

dy/dx 3 + (o)

or could I have just written 3
2. y = 3x + 2

so dy/dx = 3

no need to write the zero, I believe
3. (Original post by SakuraE)
Do you have to include the zero when you differentiation a number

as in

y = 3x +2

dy/dx 3 + (o)

or could I have just written 3
You could have just written 3.
4. Don't need to write 0. It is assumed
5. Also this could cost you a mark, don't write dy/dx 3

Write Dy/Dx = 3

the reason is that dy/dx 3 looks like a multiplication of dy/dx by 3, which you'll only encounter in A2 level maths
6. Thank you : )

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