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What does derivative mean? The derivative of a function the represents the gradient of the function for each value of x. Remark that the gradient of a function at point (x,f(x)) is equal to the gradient o...

A wave could be transverse or longitudinal. We like to think in terms of whole waves. This is when a particle comes back to it's original position and direction of movement. For transverse waves, we can s...

f(x) = 7xe^xUsing the product rule: [f'(x)=u*(dv/dx)+ v*(du/dx)]Let u=7x and v=e^xTherefore, du/dx=7 and dv/dx=e^xHence, f'(x) = 7xe^x + 7e^x

The psychology A-level specifications expect students to critically evaluate the experimental design and validity of the studies that they have been looking at throughout the year. This question has a sim...

-         First need to consider conceptual factors – does a referendum weaken aspects of representative democracy by increasing the risk of what de Tocqueville described as a ‘tyranny of the majority’. D...