There is no solution.

Because the sum of three odd numbers cannot be equal to an integer.

But if you add symbols, or unit description, decimal and other conditions, you can form a stand.

For example: 1 day+1 hour +5 hours =30 hours.

1-3-5+7-9+ 1 1+ 13+ 15=30

Using factorial, 3+11+13 = 30 (3 = 6).

Turn 9 upside down to get 6,6+11+13 = 30.

Use decimals, such as 5. 1+9.9+ 15=30.

15+15+15' = 30 ('stands for derivative, and the derivative of constant is 0, that is, 15'=0).

Use decimal system, such as 1 1, 15+ 15 = 30.

Use the logarithm log3 (9)+13+15 = 30 (log3 (9) = 2).

Exponential function is an important function in mathematics. This function applied to the value e is written as exp(x). It can also be equivalently written as e, where e is a mathematical constant and the base of natural logarithm, which is approximately equal to 2.7 1828 1828, also known as Euler number.

Exponential function is an important function in mathematics. This function applied to the value e is written as exp(x). It can also be equivalently written as e, where e is a mathematical constant and the base of natural logarithm, which is approximately equal to 2.7 1828 1828, also known as Euler number. A must be greater than zero, the exponential function is a> in 1, the negative value of the exponential function is very flat, and the positive value of x rises rapidly. When x equals 0, y equals 1. When 0

As a function of the real variable x, the image of y = e x is always positive (above the x axis) and increasing (from left to right). It never touches the X axis, although it can be anywhere near it (so, the X axis is the horizontal asymptote of this image. Its inverse function is natural logarithm ln(x), which is defined on all positive numbers X.

Sometimes, especially in science, the term exponential function is more generally used for exponential functions with the shape of k * a x, where a is called "base" and is any positive real number that is not equal to 1. Firstly, this paper mainly studies the exponential function based on Euler number e.

The general form of exponential function is y = a x(a >；; 0 and ≠ 1) (x∈R). From the above discussion about power function, we can know that if X can take a whole set of real numbers as the domain, we only need to make A >: 0 and a≠ 1