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首先,旅游业的好处大家都已经很清楚。旅游越来越便宜,所以一般的人都可以出国。他们一面有机会了解新的文化、食物、语言和历史,另一方可以帮当地的人赚钱。世界各国互相联系。但是也有坏处, 比如说环境破坏。这么多人出去旅行,有地方变成旅游热点,有时候没办法应付对该地方文化,环境和社会的后果。
Write out the product rule: if y=f(x)g(x) where f and g are functions, dy/dx = f'(x)g(x) + f(x)g'(x)Substitute in the expressions from the question:Therefore if f(x)=cos(3x) and g(x) = cosec(5x), f'...
start of by expanding the braquet which has got a power(x + 2y) (x + 2y) = X2 + 2xy + 2xy + 4Y2then simplify that => x2 + 4xy + 4y2then multiply that by (x -...
First thing you would do is write down the coordinates where the tangent meets the curve. After that you would differenciate the equation (f(x)) of the curve (do dy/dx) in order to get f'(x).Then you woul...
We can denote the sides of the rectangle with a and b. As one side of the separated area is going to be the wall of the house, we do not have to use a fence there. Therefore, we will have two sides, one ...
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