how to write sqrtroot power 7 ?

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Grégoire
Grégoire 2024-2-22
评论： DGM 2024-2-22
Hi,
i m trying to write this function in MatLab g(x) = sqrt^7(14x-7) but i don t know how to write the power of a root.
I would love to learn how to do it,
thanks

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采纳的回答

Dyuman Joshi
Dyuman Joshi 2024-2-22
编辑：Dyuman Joshi 2024-2-22
Ran in:
Use power, .^ and define a Function Handle -
g = @(x) sqrt(14.*x - 7).^7
g = function_handle with value:
@(x)sqrt(14.*x-7).^7
g(2)
ans = 4.2439e+04
g(1/2)
ans = 0
g([1/2 2])
ans = 1×2
1.0e+04 * 0 4.2439
I suggest you take the free MATLAB Onramp tutorial to learn the syntax and basics of MATLAB.
  2 个评论
DGM
DGM 2024-2-22
You sure you're looking for
(14*x - 7)^(7/2)
instead of
(14*x - 7)^(1/7)

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更多回答（2 个）

Hassaan
Hassaan 2024-2-22
编辑：Hassaan 2024-2-22
Ran in:
x = 2; % Example value for x
resultFromRootFunction = nthroot(14*x - 7, 7);
resultFromPowerFunction = (14*x - 7)^(1/7);
disp(['Using nthroot: ' num2str(resultFromRootFunction)]);
Using nthroot: 1.5449
disp(['Using power operator: ' num2str(resultFromPowerFunction)]);
Using power operator: 1.5449
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MATLAB Onramp | Self-Paced Online Courses - MATLAB & Simulink (mathworks.com)
References:
Real nth root of real numbers - MATLAB nthroot (mathworks.com)
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Sam Chak
Sam Chak 2024-2-22
Ran in:
@Grégoire, If you mean this function:
then you can use the function handle:
g = @(x) (sqrt(14*x - 7)).^7;
x = 0.5:0.01:1;
plot(x, g(x)), grid on, xlabel x, ylabel g(x)

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