i want to write a code where equation is y=x*x. if y=100 what is the value of x?

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rakesh kumar
rakesh kumar 2020-9-18
评论： rakesh kumar 2020-9-18
i have written
z=100;
for x=1:1:20
y=x*x
if y==z
fprintf(x)
end
end

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采纳的回答

Stephen23
Stephen23 2020-9-18
编辑：Stephen23 2020-9-18
>> f = @(x) x.^2 - 100;
>> x = fzero(f,pi)
x = 10
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Stephen23
Stephen23 2020-9-18
编辑：Stephen23 2020-9-18
This
@(x) x.^2 - 100
defines an anonymous function:
https://www.mathworks.com/help/matlab/matlab_prog/anonymous-functions.html
fzero uses that function to find the zero crossing (i.e. the input value for which the function output is zero).

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更多回答（1 个）

KSSV
KSSV 2020-9-18
z = 100 ;
x = 1:20 ;
y = x.^2 ;
y(x==z)

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