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Let's answer the question by solving an example:

Take (8x² * 5x⁴ * 2y³)/(20x³). Firstly, let's take a look at the first bracket and rearrange it so we ha...

Historians acknowledge many factors causing the outbreak of war in 1939, however it is a culmination of these factors that must be seen as the ultimate cause in triggering the beginning of World War Two. ...

Both of these elements are part of the 2nd group of elements on the periodic table. ie in first ionisation, their electron configuration changes from nS2 -> nS1.

Strontium is a much larger eleme...

dy/dx = 3x^2-2x+6

At (1,5), dy/dx = 7. 7 is the gradient of the tangent, therefore the gradient of the normal at (1,5) is -1/7.