Mathematics, 13.10.2020 04:01 kbuhvu
Let x1, . . . , xn be real numbers representing positions on a number line. Let w1, . . . , wn be positive real numbers representing the importance of each of these positions. Consider the quadratic function: f(θ) = 1 2 Pn i=1 wi(θ − xi) 2 . What value of θ minimizes f(θ)? Show that the optimum you find is indeed a minimum. What problematic issues could arise if some of the wi 's are negative? [NOTE: You can think about this problem as trying to find the point θ that's not too far away from the xi 's. Over time, hopefully you'll appreciate how nice quadratic functions are to minimize.] [HINT: View f(θ) as a quadratic function in θ, i. E. F(θ) = αθ2 +βθ +γ, where α, β, γ are real numbers depending on wi 's and xi 's.]
Answers: 3
Mathematics, 21.06.2019 20:40
In each of the cases that follow, the magnitude of a vector is given along with the counterclockwise angle it makes with the +x axis. use trigonometry to find the x and y components of the vector. also, sketch each vector approximately to scale to see if your calculated answers seem reasonable. (a) 50.0 n at 60.0°, (b) 75 m/ s at 5π/ 6 rad, (c) 254 lb at 325°, (d) 69 km at 1.1π rad.
Answers: 3
Mathematics, 21.06.2019 22:00
15 points what is the end behavior of this graph? & what is the asymptote of this graph?
Answers: 1
Let x1, . . . , xn be real numbers representing positions on a number line. Let w1, . . . , wn be po...
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