Solve Equation (a)LI² + RI + 1/C = 0 for I (b)(x-h)² + (y-k)² = r² for y
人气:253 ℃ 时间:2020-06-24 20:27:34
解答
a LI² + RI + 1/C = 0 for I I^2+RI/L+1/CL=0(L≠0) (I+R/2L)^2+1/CL-R^2/4L^2=0 (I+R/2L)^2=R^2/4L^2-1/CL I = [-RC ± √(R^2*C^2 - 4LC)]/2LC b (x-k)² + (y-k)² = r² for y (y-k)^2=r^2-(x-h)^2 y = k ± √[r^2 - (x - h)^2]