# Past Papers’ Solutions | Edexcel | AS & A level | Mathematics | Core Mathematics 1 (C1-6663A/01) | Year 2014 | January | Q#2

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**Question**

,

**a. **Find , giving each term in its simplest form.

**b. **Find , giving each term in its simplest form.

**Solution**

**a.
**

We are given;

We are required to find .

Gradient (slope) of the curve is the derivative of equation of the curve. Hence gradient of curve with respect to

Therefore;

Rule for differentiation is of

Rule for differentiation is of

Rule for differentiation is of

**b.
**

We are required to find

Second derivative is the derivative of the derivative. If we have derivative of the curve

From (a) we have;

Therefore, for the given case;

Rule for differentiation is of

Rule for differentiation is of

Rule for differentiation is of

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