Tutor profile: Shivangi R.
Find the derivative of (x^3+7x+1)/x.
I use the quotient rule for derivatives. ((3x^2+7)(x) - 1(x^3+7x+1))/x^2 (3x^3+7x-x^3-7x-1)/x^2 (2x^3-1)/x^2
There are three boxes, each of which contains two coins. One box has two gold coins, one has two silver coins, and one has a gold coin and a silver coin. A box is picked at random and then a coin is picked at random from the box. Given that the coin is gold, what is the chance that the other coin in the box is silver?
One has to use Bayes Rule to solve this problem. (1/2)(1/3)/(1/6)+(1/3) = 1/3
solve the equation: -0.25 x + 1.3 = -0.55 x - 0.2
-0.25 x + 1.3 = -0.55 x - 0.2 0.3x = -1.5 x = -5
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