Mathematics, 16.07.2021 05:50 juli8350
已知一个质点做变速直线运动的位移函数 s 3t 2 e2t , t为时 间,则在时刻t 2处的速度和加速度分别为
Answers: 2
Mathematics, 21.06.2019 16:50
The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?
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Mathematics, 21.06.2019 19:50
Prove (a) cosh2(x) − sinh2(x) = 1 and (b) 1 − tanh 2(x) = sech 2(x). solution (a) cosh2(x) − sinh2(x) = ex + e−x 2 2 − 2 = e2x + 2 + e−2x 4 − = 4 = . (b) we start with the identity proved in part (a): cosh2(x) − sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 − sinh2(x) cosh2(x) = 1 or 1 − tanh 2(x) = .
Answers: 3
Mathematics, 21.06.2019 20:00
Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.
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Mathematics, 21.06.2019 23:30
Apyramid fits exactly inside a cube. the cube and the pyramid share the same square base, and they are both exactly the same height. the volume of the cube is 66 cubic inches. what is the volume of the pyramid? explain your answer. answer asap
Answers: 1
已知一个质点做变速直线运动的位移函数 s 3t 2 e2t , t为时 间,则在时刻t 2处的速度和加速度分别为...
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