# how to write sqrtroot power 7 ?

5 views (last 30 days)
Grégoire on 22 Feb 2024
Commented: DGM on 22 Feb 2024
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

Dyuman Joshi on 22 Feb 2024
Edited: Dyuman Joshi on 22 Feb 2024
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.
Grégoire on 22 Feb 2024
thanks !
DGM on 22 Feb 2024
You sure you're looking for
(14*x - 7)^(7/2)
(14*x - 7)^(1/7)

Hassaan on 22 Feb 2024
Edited: Hassaan on 22 Feb 2024
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
MATLAB Basic Training:
References:
-----------------------------------------------------------------------------------------------------------------------------------------------------
If you find the solution helpful and it resolves your issue, it would be greatly appreciated if you could accept the answer. Also, leaving an upvote and a comment are also wonderful ways to provide feedback.
It's important to note that the advice and code are based on limited information and meant for educational purposes. Users should verify and adapt the code to their specific needs, ensuring compatibility and adherence to ethical standards.
Professional Interests
• Technical Services and Consulting
• Embedded Systems | Firmware Developement | Simulations
• Electrical and Electronics Engineering
Feel free to contact me.

Sam Chak on 22 Feb 2024
@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)

### Categories

Find more on Startup and Shutdown in Help Center and File Exchange

R2023b

### Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!