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Aside from the 2 trivial answers, 0000x0=0000 and 1111x1=1111, there is one other answer. 1089*9=9801.

You find C & E pretty quickly, as running through the digits 2-9 yields either impossible situations or results exceeding 4 digits. It takes similar trial and error to deduce the other two digits such that it works out.

Q: What is cake X e equals ekac?

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When x = 3.806663, tan(e^x) = 1.

it means e = MC2 which is M x c x 2

Question: 2x + e = 5x - 2x 3x = e x = e/3

Ohm's Law is E = I x R

x = 1/e where e is the base of natural logs.

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When x = 3.806663, tan(e^x) = 1.

it means e = MC2 which is M x c x 2

Question: 2x + e = 5x - 2x 3x = e x = e/3

x = 1/e where e is the base of natural logs.

Ohm's Law is E = I x R

e times 5 = X

Use integration by parts. integral of xe^xdx =xe^x-integral of e^xdx. This is xe^x-e^x +C. Check by differentiating. We get x(e^x)+e^x(1)-e^x, which equals xe^x. That's it!

Powers of e are simple to integrate. The derivative of eu equals u'eu; inversely, the antiderivative of eu equals eu/u'. Therefore, the antiderivative of e1/-x equals (e1/-x)/{d/dx[1/-x]}. The derivative of 1/-x, which can also be expressed as x-1, equals (-1)x(-1-1) = -x-2 = -1/x2.

The power law of indices says: (x^a)^b = x^(ab) = x^(ba) = (x^b)^a → e^(2x) = (e^x)² but e^x = 2 → e^(2x) = (e^x)² = 2² = 4

5.8

yup

Very close to -0.70348