| Exam Board | Edexcel |
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| Module | PMT Mocks (PMT Mocks) |
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| Topic | Differentiation from First Principles |
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3. Given that
$$y = \frac { 1 } { 3 } x ^ { 3 }$$
use differentiation from first principle to show that
$$\frac { \mathrm { d } y } { \mathrm {~d} x } = x ^ { 2 }$$