Can anyone help me to solve this problem,

Hi all,

I tried to use two equations to solve two unknowns, but it said cannot find answer because needing at least two arguments that is applied to 1.

I don't understand what that means. I have attached the worksheet and looking forward to hearing your solutions.

thanks

Best answer by Fred_Kohlhepp

Your sheet was using the function In() function, not ln(). Mathcad won't evaluate In(A/D), that function requires two inputs.

23-Emerald I

The function In() requires two arguments, you supplied one (A/D). Change to In(A,D), and your sheet calculates.

Author

1-Visitor

Many thanks for your replying, I tired to change to In(A,D) like you said it did calculate.

But it seems the answer calculated is slightly different due to In(A/D) and In(A,D) have a different meaning.

What do you think?

Answer

23-Emerald I

Your sheet was using the function In() function, not ln(). Mathcad won't evaluate In(A/D), that function requires two inputs.

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