LImit is not corrcet

2 次查看（过去 30 天）
Shivangi Chauhan
Shivangi Chauhan 2017-1-20
编辑： Jan 2017-1-20
Hi All, I am trying to find the limit of below function in matlab :
limit(( -24*sin(x)+6*x*exp(x)+30*x*sin(x)+6*x*cos(x)-exp(x)*(x^3)-((x^3))*sin(x)-((x^3))*cos(x)-24+4*((x^3))-6*((x^2))*sin(x))/(6* ((x^4))* sin(x)),x,0)
and ans is
NaN
But Actual answer is 26/120. Can anyone help me...how to write in matlab?

请先登录，再回答此问题。

回答（1 个）

Jan
Jan 2017-1-20
编辑：Jan 2017-1-20
My first guess is that you have a typo in your formula. The second guess is, that the source of your opinion, that 26/120 is the correct limit, is wrong.
What about checking the formula manually?
x = -0.01:0.000001:0.01;
y = -24.*sin(x)+6*x.*exp(x)+30*x.*sin(x)+6*x.*cos(x)-exp(x).*(x.^3)-(x.^3).*sin(x) - ...
(x.^3).*cos(x)-24+4*(x.^3) - 6.*((x.^2)).*sin(x))./(6* (x.^4).* sin(x);
plot(x, y);
It does not look like the equation has a limit at the position 0. I know this is not a mathematical proof, but a strong hint to get more doubts.

类别

在 Help Center 和 File Exchange 中查找有关 Matrix Indexing 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by