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Leguminous plants have nodules on their roots that contain, symbiotic bacteria. These bacteria are capable of turning gaseous nitrogen ultimately to nitrate, which the plant can then use in order to synth...

To see where the graph is greater than zero, we start by finding where it meets zero. By factorising (x^2 - 7x - 18), we find it equals (x-9)(x+2). The expression equals zero at the points x = 9 and x = -...

In order to accurately explore the role of women in medieval society, and in relation to knighthood, it is most effective to look at a combination of primary and secondary sources. Starting with the rise ...

In French the past participles of direct verbs have to agree with the gender or number of their object. For example, ‘I saw him’ translates as ‘je l’ai vu’, but ‘I saw her’ as ‘je l’ai vue’, and 'I saw th...

To solve this question, we need to use the chain rule, because the function is too complicated to solve simply by inspection. The chain rule says that dy/dx = dy/du × du/dx, where u is a function of x. In...