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Plurals are formed according to the gender of the noun: normally a feminine nouns ending in a have their plural ending in e (casa-case), those ending in e have their plural ending in i (fune-funi). Mascul...

When addressing questions like this, it's very important not to simply describe why the USA did not enter the Second World War until 1941. Normally, to unpack questions like this, its importan...

first the definition of the rank of a matrix is "maximal number of linearly independent column vectors in the matrix"

then the question could be rephrased to " how many ind...

 ∫(21x⁶-e^2x-1/x+6)dx

To tackle this question, I would do each part separately.

Firstly, take 21x⁶...using the product rule this intergrates ...

A perfectly competitive market is a market in which there are many buyers and many sellers who all have perfect information.

There are many firms in the market who all produce exactly the...