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If a+b+c=4, ab+ac+bc=6, and abc=3, what is 1/a + 1/b + 1/c? Number Theory: Find the roots of 4x^2+6x+1 in Z11 (could you please explain step by step? THANKS!)? Find Marginal Cost from total cost function (P^2)A(P)? Solve the equation for x.
e^x = 85? 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?