Let the random variable X have pdf f(x) = kx - 1 , 2 lessthan x lessthan 4. (a) Find the value of k. (b) Find the cdf of X. (c) Find P(2.5 lessthan X lessthan 3). (d) Find the mean and variance of X. Sup...
1Known that the two real roots of the equation 2x2+kx−2k+1=0 is a and b,a2+b2 is 294, then the value of k is( ).已知方程2x2+kx−2k+1=0的两实根是a和b,a2+b2为294,则k的值为 . 2【题目】Known that the two real roots of the equation2x2+kx-2k+1=0 is a and b,...
9.Coordinate Geometry 解析几何* 直线的标准方程:y=kx+b ;即斜截式,其中 k 为斜率 slope,b 为 y 轴截距y-intercept* 斜率的计算:K= (Y2-Y1)/( X2-X1)* 两点或一点加斜率确定一条直线。* 两直线垂直,其斜率的乘积为1。第四章 统计1. arithmetic mean (average) 21、 算术平均值1 nE=å ain...
The p.d.f. of the random variable of X is given by: f(x) = k(e^{-2x}-e^{-3x}), x is greater than 0 0, elsewhere a) Find the value of k. b) Use the p.d.f. to find P(X is greater than L). Let X be a ran...
But while the redesigned M2 version of the MacBook Air (which has been with us for a while as well) seems poised to take over as the top value choice, the 2020 version with an M1 processor and fanless design remains available at some retailers as a solid budget option. It’s best ...
c, The mean avalanche size S ∼ Tx+1 = T2 below the demagnetization cutoff and ∼T above it, and the power spectrum for Ω = 0.05 Hz goes as ω−(x+1) = ω−2 (inset). d, The distribution of voltages P(V|k,c) ∝ Vc−1 exp(−kV). Note that a,b and d are...
12 Consider the equation kx2-k(x+2)=x(2x+3)+1 in x.(1)For what value(s)of k is this equation a quadratic equation in one variable?(2)For what value(s)of k is this equation a linear equation in one variable?(3)Is -1 a root of the equation?Why?12 Consider the e...
SANT domains are found in a number of chromatin regulators. They contain approximately 50 amino acids and have high similarity to the DNA binding domain of Myb related proteins. Though some SANT domains associate with DNA others have been found to bind u
determine the value of k for which the system of linear equations 2x- y = 2 6x + ky = 5 has no solution. k = Determine all values of h and k for which the linear system 5x + 6y + 7z = 6 \\-2x - 8y - 7z = -7 \\3x + 26y + hz = k...
Find the values of a and b for which the following function f is continuous at every x: {eq}f(x)=\begin{cases} -3 & x\leq -1 \\ ax-b & -1< x< 1\\ 4 & x\ge 1 \end{cases} {/eq} Continuity: A function is continuous if...