Yes, you can 'takeaway' food from the main Restaurant and from the drive through.
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Suppose N is a perfect number. Then N cannot be a square number and so N has an even number of factors.Suppose the factors are f(1) =1, f(2), f(3), ... , f(k-1), f(k)=N.Furthermore f(r) * f(k+1-r) = N for r = 1, 2, ... k so that f(r) = N/f(k+1-r)which implies that 1/f(r) = f(k+1-r)/NThen 1/f(1) + 1/(f(2) + ... + 1/f(k)= f(k)/N + f(k-1)/N + ... + f(1)/N= [f(k) + f(k-1) + ... + f(1)] / N= 2N/N since, by definition, [f(k) + f(k-1) + ... + f(1)] = 2N
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°F to °C: [°C] = ([°F] − 32) × 5⁄9°C to °F: [°F] = [°C] × 1.8 + 32
Mo t h e r f o c k e r ! !
ex+f = c -dx ex+dx = c -f x(e+d) = c -f x = c -f/(e+d)