Solve for x with given equation

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Muhammad Syauqi
Muhammad Syauqi 2024-4-14
编辑： Sam Chak 2024-4-14
Ran in:
I have a problem trying to find the value in this long equation, whats the correct input?
I consider f'c = x so i use syms x
and below my simplified attempt but no result
syms x
3.818=x(1-sqrt(1-(2.809*10^-5*(42/sqrt(x))^2+7.9*10^-3*(42/sqrt(x))-0.0053*(42/sqrt(x))
Incorrect use of '=' operator. Assign a value to a variable using '=' and compare values for equality using '=='.

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回答（1 个）

Alan Stevens
Alan Stevens 2024-4-14
Look up the help on function fzero.
And don't forget that Matlab doesn't recognise implicit multiplication. x(...) should be x*(...)

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