# What does Expint mean in Matlab?

## What does Expint mean in Matlab?

Description. example. Y = expint( X ) evaluates the exponential integral for each element of X .

**How do you find the integral of an exponential function?**

The exponential function, y=ex, is its own derivative and its own integral. Exponential functions can be integrated using the following formulas. Find the antiderivative of the exponential function e−x. Use substitution, setting u=−x, and then du=−1dx.

**What is EI in Matlab?**

Description. example. ei( x ) returns the one-argument exponential integral defined as. ei ( x ) = ∫ − ∞ x e t t d t .

### What is E1 function?

The functions Ei(x) for x > 0 and E1(x) for x < 0 are defined as Cauchy principal value integrals. As x varies from 0 to +∞, E1(x) varies monotonically from +∞ to zero. E1(x) is asymptotic to x−1e−x as x approaches +∞ or −∞, and to − ln |x| as x approaches zero.

**Is derivative and integration of e x is same?**

We know that the derivative of ex is ex. Since the integral is the inverse operation of differentiation, the integral of ex is also ex. i.e., ∫ ex dx = ex + C.

**How do you differentiate between exponential and integration?**

Solution

- Since. ex = (ex)’ We can integrate both sides to get. ex dx = ex + C.
- For this integral, we can use u substitution with. u = ex, du = ex dx. The integrals becomes. = eu + C.

#### How do you use Expint in MATLAB?

For positive real x , expint(x) = -ei(-x) . For negative real x , expint(x) = -pi*i – ei(-x) . If one input argument is a scalar and the other argument is a vector or a matrix, then expint(n,x) expands the scalar into a vector or matrix of the same size as the other argument with all elements equal to that scalar.

**How do you find the integral in MATLAB?**

If MATLAB is unable to find an answer to the integral of a function f , it just returns int(f) . Definite integration is also possible….Integration.

f | a, b | int(f, a, b) |
---|---|---|

syms x f = log(x)*sqrt(x); | a = 0; b = 1; | int(f, a, b) ans = -4/9 |

syms x f = exp(-x^2); | a = 0; b = inf; | int(f, a, b) ans = pi^(1/2)/2 |

**What is the integral of ln x?**

u = ln(x), dv = dx then we find du = (1/x) dx, v = x substitute ln(x) dx = u dv and use integration by parts = uv – v du substitute u=ln(x), v=x, and du=(1/x)dx = ln(x) x – x (1/x) dx = ln(x) x – dx = ln(x) x – x + C = x ln(x) – x + C. Q.E.D.

## How do you solve LNX=2?

https://socratic.org/questions/how-do-you-solve-ln-x-2-2-1. The solution is displaystyle {x}= {e} . Explanation: First you apply the rule of the log for the powers displaystyle {ln { {left ( {x}^ { {k}}right)}}}= {k} {ln { {left ( {x}right)}}} then, for you The solution is x = e .

**How do you find the derivative of ln (LNX)?**

Derivative of the Logarithm Function y = ln x. The derivative of the logarithmic function y = ln x is given by: `d/(dx)(ln x)=1/x` You will see it written in a few other ways as well. The following are equivalent: `d/(dx)log_ex=1/x` If y = ln x, then `(dy)/(dx)=1/x`

**How to integrate LNX 2?**

integral of ln (x)^2. square! square! . Get step-by-step solutions from expert tutors as fast as 15-30 minutes. Your first 5 questions are on us!