- #1
coki2000
- 91
- 0
Hello,
For 1 and 2 I want to calculate rms then
[tex]x_{rms}=\sqrt{\frac{1}{n}\sum_{i=1}^{n}x_i^2}\Rightarrow x_{1,2}=\sqrt{\frac{1}{2}(1^2+2^2)}=\sqrt{\frac{5}{2}}[/tex]
And also
[tex]x_{rms}=\sqrt{\frac{1}{x_2-x_1}\int_{x_1}^{x_2}f^2(x)dx}[/tex]
For the function [tex]f(x)=x[/tex], [tex]x_1=1[/tex], [tex]x_2=2[/tex]
[tex]x_{rms}=\sqrt{\frac{1}{2-1}\int_{1}^{2}x^2dx}=\sqrt{\frac{7}{3}}[/tex]
Please explain to me where I do wrong.
Thanks
For 1 and 2 I want to calculate rms then
[tex]x_{rms}=\sqrt{\frac{1}{n}\sum_{i=1}^{n}x_i^2}\Rightarrow x_{1,2}=\sqrt{\frac{1}{2}(1^2+2^2)}=\sqrt{\frac{5}{2}}[/tex]
And also
[tex]x_{rms}=\sqrt{\frac{1}{x_2-x_1}\int_{x_1}^{x_2}f^2(x)dx}[/tex]
For the function [tex]f(x)=x[/tex], [tex]x_1=1[/tex], [tex]x_2=2[/tex]
[tex]x_{rms}=\sqrt{\frac{1}{2-1}\int_{1}^{2}x^2dx}=\sqrt{\frac{7}{3}}[/tex]
Please explain to me where I do wrong.
Thanks