I am trying to do multi step math and keep returning the wrong answer

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Matthew 2024-4-19

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https://ww2.mathworks.cn/matlabcentral/answers/2109126-i-am-trying-to-do-multi-step-math-and-keep-returning-the-wrong-answer

评论： Dyuman Joshi 2024-4-19

采纳的回答： John D'Errico

I am given the equation and this is my code but it keeps telling me that it is returning the wrong value.

b=(1/7)+((72/13)^2)/(sqrt((125/2)-(25/3)))

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Dyuman Joshi 2024-4-19

The expression and the code match, so you are good.

How is the test case in Grader comparing the value with the output?

Matthew 2024-4-19

Variable b has an incorrect value.

This is all it tells me, I believe she just has a value set that she got from running it. Thank you for looking I will talk to her.

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采纳的回答

John D'Errico 2024-4-19

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编辑：John D'Errico 2024-4-19

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Of course it is wrong. Why did you write 72/13? Why 25/3?

I think you don't understand that

8(1/3) is NOT the same thing as

8 + 1/3

Similarly, you see essentially

5 (7/13)

and you are trying to add fractions!

b=(1/7)+((5*7/13)^2)/(sqrt((125/2)-8*1/3))
b = 1.0799

Do you see what you are doing? When you have an expression like that, you should not assume an implicit addition there. I think you are confused because some people will write

5 1/2

as meaning 5 PLUS 1/2, and thus effectively 5.5.

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Sam Chak 2024-4-19

Also be careful when you guys use WolframAlpha.

Case 1: Without space

Case 2: With space

Dyuman Joshi 2024-4-19

Even I took them as mixed fractions and responded accordingly. I was going to ask for a clarification but in the mean time John had already answered the question.

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