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Problem involving math induction! If m and n are distinct real numbers, prove that (m+2)^2 = (n+2)^2 if and only if x+y=-4? If a+b+c=4, ab+ac+bc=6, and abc=3, what is 1/a + 1/b + 1/c? How many molecules are in 97.8g of FeCl3? Find Marginal Cost from total cost function (P^2)A(P)? Questions for medicine I could not get it and I need your help?