It seems there are a few symbols in your function that might be unclear or potentially mistyped. Based on the expression you've provided, I'll attempt to interpret and correct it:

1. The term cos h' might be intended as \cosh', which could be referencing the derivative of the hyperbolic cosine function, $\cosh(x)$.
2. The term x'2 might be intended as $x^2$, representing the square of $x$.

Given these assumptions, the function could be intended as: $f(x) = \cosh' \left(\sqrt{x^2 + 1}\right) - 1$

This interpretation involves the derivative of the hyperbolic cosine function applied to $\sqrt{x^2 + 1}$, and then subtracting 1.

Steps to Interpret and Solve

1. Derivative of $\cosh(x)$: The derivative of the hyperbolic cosine function $\cosh(x)$ is the hyperbolic sine function $\sinh(x)$. So, $\cosh'(x) = \sinh(x)$

2. Applying to the Function: $f(x) = \sinh\left(\sqrt{x^2 + 1}\right) - 1$

Thus, the function $f(x)$ can be rewritten as: $\boxed{f(x) = \sinh\left(\sqrt{x^2 + 1}\right) - 1}$

Explanation:

• $\sinh(x)$ is the hyperbolic sine function, which is related to the exponential functions and often appears in problems involving hyperbolic geometry or certain differential equations.
• The expression inside the hyperbolic sine function, $\sqrt{x^2 + 1}$, suggests that this might be related to a curve or surface in hyperbolic space or another context where hyperbolic functions naturally arise.

Would you like more details or have any questions?

Here are some related problems you can try:

1. Evaluate $f(x) = \sinh\left(\sqrt{x^2 + 4}\right) - 2$ at $x = 0$.
2. Differentiate $f(x) = \cosh\left(2x^2\right)$ with respect to $x$.
3. Solve $f(x) = \sinh\left(\sqrt{x^2 + 9}\right) - 3$ for $x$.
4. Find the second derivative of $f(x) = \sinh\left(\sqrt{x^2 + 1}\right)$.
5. Integrate $\int \sinh\left(\sqrt{x^2 + 1}\right) dx$.

Tip: Hyperbolic functions, like $\sinh(x)$ and $\cosh(x)$, have similar properties to trigonometric functions but are based on hyperbolas rather than circles. They often appear in problems related to relativistic physics and certain types of differential equations.