# solving definite integrals exponential

7 visualizaciones (últimos 30 días)
Bradley Johnson el 10 de Feb. de 2020
Respondida: Jyothis Gireesh el 13 de Feb. de 2020
im trying to integrate e^(x/2) from -2 to 10 and cant get it to actually solve the integral function instead i get the answer : 2*exp(-1)*(exp(6) - 1).
I entered :
syms x;
f = exp(x./2);
A = int(f, -2,10)
##### 1 comentarioMostrar -1 comentarios más antiguosOcultar -1 comentarios más antiguos
Walter Roberson el 10 de Feb. de 2020

Iniciar sesión para comentar.

Jyothis Gireesh el 13 de Feb. de 2020
I am assuming that you want to know the reason behind the solution being an analytic expression instead of a numeric answer. According to the documentation on symbolic integral function “int()”, it returns a symbolic expression as output.
To get a numeric answer, you may use the “vpa” function in MATLAB. This function evaluates the symbolic input to 32 significant digits (by default). In addition, it also provides the provision to limit the number of significant digits by taking a second input argument. In this case, the expression evaluates to
vpa(A)
ans =
296.09055932281032219904011254078
Please refer to the following documentation link on “vpa” for any further clarifications.
##### 0 comentariosMostrar -2 comentarios más antiguosOcultar -2 comentarios más antiguos

Iniciar sesión para comentar.

### Categorías

Más información sobre Calculus en Help Center y File Exchange.

### Community Treasure Hunt

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

Start Hunting!

Translated by