- Prove that if n is divisible by 4, then n^3 -n is divisible by 4?

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Find integers x and y such that 57x+79y=17, and 400 Let X1 & X2 have joint pmf p(x1, x2)=(x1x2)/36. 0 otherwise Find joint pmf of Y1=X1X2 and Y2=X2? Total surface of human body 1.2m^2
face temp. 30degree
surrounding 20degree
what is the heat loss from body by radiation? ? Graph each function for the given domain 1. 3x-Y=1;D:{-3,-1,0,4} 2. F(x)=x+4;D:{-5,-3,0,4}? Multiply matrices A and B of any sizes legally (no size compatibility requirment). What kind of matrix multiplication am I?