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In ‘A Streetcar Named Desire’, Tennessee Williams portrays mental illness and personal trauma as something to be masked and concealed. Before Stanley rapes Blanche, she reveals to Mitch; “Yes, yes, magic!...

The differential is the slope of the graph at any point. So if we imagine a cosine in our heads, it starts at a peak and goes down to a negative peak. So in terms of the gradient (or slope) it starts at 0...

it is subjunctive because it is part of an indirect question.

f'(x)=lim(h->0) of [f(x+h)-f(x)]/h. In the case where f(x)=x^n, we have that f(x+h)-f(x)=h*nx^(n-1) + (h^2)*p(x) for a polynomial p(x), shown by binomially expanding f(x+h). Then dividing through by h ...

One crucial thing to remember, which is such a common mistake by students, is to remember it is an EXTRACT. The texts are not "sources", they are extracts from historians writing their take on t...