解析 A【答案】A【核心短语/词汇】exponential function:指数函数【翻译】指数函数y=e^1/x的水平渐近线方程为y=0。【解析】根据题干可知,y=e^1/x为指数函数,当x趋向于无穷大时,y趋向于0,所以它的水平渐近线方程为y=0。故选项A正确。 反馈 收藏
B = fminsearch(@(b) err_fcn(b,x,y,ones(size(y)),mod_fcn), [2; -0.1; -5]) % Estimate Parameters plot(xval,yval,xval,mod_fcn(B,xval)) Doesn't look like a particularly good fit, but that's what you get. More suitable model-function? Mixed up/confused...
This is the code I have, Any ideas why I'm getting this error? I am a college student and just started working with matlab A=4 a=exp(-0.5*t) y(t)=A*a(sin(2*pi*3*t)).*(ustep(t+1)-ustep(t-1)) t=linspace(-2,2) ...
Answer to: Let X∼Exponential(λ), and Y = aX, where a is a positive real number. Show that Y∼Exponential(λa). By signing up,...
generated using BATWING30 using an exponential growth model, an average mutation rate of 0.0028 per locus per generation for microsatellites31,32 and a generation time of 30 years, compatible with population-based estimates for males.33 BATWING was run on samples comprising DCs to reduce computation...
Vy=eh2Blog x0(4−π)J0HyHz28(AπmckT)2(a0d3+BΛJ0δ) i.e. a saturation for largeJ0. Finally we must calculate the same effect for a semiconductor with conducting ‘holes’. The calculations are similar to that of §2, with the difference that instead of (7) the expression ...
在给定的方程中,x和y的关系是非线性的。 8. The polynomial function f(x) = x^3 - 3x^2 + 2x - 1 represents a specific relationship between x and y. 多项式函数f(x) = x^3 - 3x^2 + 2x - 1表示x和y之间的特定关系。 9. The exponential function y = e^x grows rapidly as x increa...
21(b) and 21(c) the associated edge Floquet modes in Eq. (9.17) are shown and their exponential decay is highlighted. To gain an intuitive understanding of the chirality of this system, consider the group velocity corresponding to a gapless mode. Along both curves the slope and therefore ...
用e表示的原因确实不明,但可能因为e是指数函数(exponential)一字的首字母。另一看法则称a,b,c,d有其他经常用途,而e是第一个可用字母。 就像圆周率π和虚数单位i,e是数学中最重要的常数之一。它有几种等价定义,下面列出一部分。 定义e为下列极限值: e=limₙ→∞(1+1/n)ⁿ e=limₜ→₀(1+t)¹...
The table of ordered pairs (x,y) gives an exponential function. Compose an equation for the function. x y 1 \frac{1}{32} 0 \frac{1}{4} 1 a) Determine whether the table represents a linear function, an exponential function, or neither. b) Write an equatio...