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f(x)=xe^(10x) Find the largest interval on which f(x) is concave upward.

f(x)=xe^(10x) Find the largest interval on which f(x) is concave upward.

Variation on Pythagoras: If $a^2 + b^2 = c^2$, then $a + b \\leq c\\sqrt{2}$?

This is a very interesting word problem that I came across in an old textbook of mine. So I know its got something to do with derivative of the Pythagorean Theorem using calculus, trigonometry,... more

03/18/19

Does an equation with i as an exponent have i solutions?

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