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In German there are three genders for nouns: masculine, feminine and neuter. There are some rules for each gender regarding how the words are formed, however the best bet is to learn each gender with the wor...

The periodic table arranges all the different elements into columns and rows, The horizontal rows are called periods, this is where the elements differ from left to right but the addition of an electron to t...

Once you have chosen the topic areas you are going to explore, structuring an essay can be easy! Following a simple guide such as the PEE(A) method I'll explain below can ensure you don't lose unneccessary m...

A quadratic equation is an equation that looks like: x 2 + 4x - 2 = 0. The general form of this is written as ax 2 + bx + c = 0, where a, b and c are all numbers, and x is our unknown variable. In the exampl...

y = 4x^3 + 7 x Recall: to differentiate any function of the form y = x^n dy/dx = y' = n x^(n-1) Hence if y = 4x^3 + 7x dy/dx = 4 ( 3x^3 -1) + 7x^(1-1) = 12 x^2 + 7