[Solved] Fraction for T₂ = T₁ x (P₂·V₂ over P₁·V₁)

[mtnylmz]

I want to enter a formula including fraction. I want to use multiplication symbol with "times". But it seems that I cannot group elements properly.
I want to make it seem as a fraction by using "over".

Here is the code I am trying: T_2=T_1 times(P_2 times V_2 over (P_1 times V_1)

It appears as following

fractions.png (1.02 KiB) Viewed 4033 times

But it should seem to be T2= T1 x (P2 V2 / P1V1)

Would someone help?

Edit: Changed subject, was A fraction example  Make your post understandable by others  -- MrProgrammer, forum moderator

[FJCC]

Does this give you what you want?

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T_2 = T_1 times {{P_2 times V_2} over {P_1 times V_1}}

[Hagar Delest]

Note that there is merely a missing ending bracket in your formula. Just a syntax typo.
But brackets are not very pretty, the code from FJCC is way nicer.

Please add [Solved] at the beginning of the title in your first post (top of the topic) with the 🖉 button if your issue has been fixed.

[mtnylmz]

Thanks it works. But is there any difference between types of paranthesis: (, {, [ ?

Do they all work in the same way? At least that example?

[Hagar Delest]

Don't know but I'm sure the help files will gives some information. The link to the 4.1 documentation is at the top of the Math forum section.

[FJCC]

There are many options for brackets in Math. Search the Math help for Brackets to see them. Bare braces are used for grouping parts of the formula and are not displayed but you can write lbrace and rbrace if you want to display braces. The attached document shows a few of the options for our formula.

[mtnylmz]

This is from a very similar example.

This code works: "{(P_b V_b)}over(P_a V_a)=(T_b)over(T_a)"

When I remove { }, the code does not work. Do you have any idea?

[FJCC]

I don't see any difference in the output between

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{(P_b V_b)}over(P_a V_a)=(T_b)over(T_a)

and

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(P_b V_b)over(P_a V_a)=(T_b)over(T_a)

[Lupp]

BTW
If you mean the well-known gas equation, which connects thermodynamic temperatures with pressures and volumes, you should write it like this:

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T sub 2 = T sub 1 cdot {{p sub 2 cdot V sub 2} over {p sub 1 cdot V sub 1}}

or like this (without an explicitly given operator for the ordinary multiplication):

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T sub 2 = T sub 1 {{p sub 2 V sub 2} over {p sub 1 V sub 1}}

By ISO standards the quantity "pressure" is denoted "p" (lower case).
In Mathematics, science and engineering the "large cross" created in Math with the reserved word times should only be used for the "outer" (non-scalar) product of matrices (or vectors) where the result again is a matrix or vector.
When in doubt, you should also prefer a clarifying (additional) pair of curly braces to a slightly shorter but possibly ambiguous notation.