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How do I force mathematica to display the below expression as a sum a+b with a scaling factor of 1/r.

(a+b)/r

I would like Mathematica to display (1/r) (a+b), ie. I want it to show 1/r as a scaling factor.

currently, it shows (a+b)/r , with r as a common denominator.

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  • $\begingroup$ Have you tried anything ? Any code you would like to share ? $\endgroup$
    – Sektor
    Mar 7 '15 at 12:19
  • $\begingroup$ ((a+b)/r)[[2]] ? $\endgroup$ Mar 7 '15 at 12:25
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    $\begingroup$ Algohi, try ((2 + x)/7)[[2]] $\endgroup$
    – DavidC
    Mar 7 '15 at 13:53
  • $\begingroup$ Coefficient[(a + b)/r, a + b]? $\endgroup$
    – kglr
    Mar 7 '15 at 15:29
  • $\begingroup$ @DavidCarraher In this case use Hold[((2 + x)/7)][[1, 2]] $\endgroup$ Mar 7 '15 at 18:26
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Here is something close to what you want

expr = (a + b)/r;
expr Denominator[expr] HoldForm[1/Denominator[expr] // Evaluate]

output

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expr = (a + b)/r
1/Denominator[expr]

Mathematica graphics

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