The command subs(f,x,0) is used to__________a.substitute x=0 in fb.substitute x=0 and y=0 in fc.substitute y=0 in fd.All of these

The command subs(f, x, 0) is typically used in programming environments and mathematical software to substitute a specified value for a variable in an expression or function. The notation suggests that it substitutes the value of $x$ with $0$ in the function $f$.

Let's break down the options provided to understand which statement is correct:

1. Substitute $x=0$ in $f$: This is correct since the command explicitly substitutes $x = 0$ in function $f$.

2. Substitute $x=0$ and $y=0$ in $f$: This is incorrect because the command only specifies substitution for $x$.

3. Substitute $y=0$ in $f$: This is also incorrect for the same reason.

4. All of these: Since the previous options (2 and 3) are incorrect, this option cannot be true.

Conclusion

Therefore, the correct usage of the command subs(f,x,0) is to substitute $x = 0$ in $f$.

Final Answer

a. substitute $x=0$ in $f$