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Re: If r > 0, s ≠ 1/2 and r = 3s +1/1-2s, then s= [#permalink]
Zohair123 wrote:
Plug in s = 1 in the RHS and calculate r. Then plug that r value in the options and see which option gives the value of s (1).

When we plug in s, we get 3(1) + 1 / 1 - 2(1) = 4 / -1 = -4.

Plug -4 in the options and see which option gives 1 as the answer.


Remember r>0
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Re: If r > 0, s 1/2 and r = 3s +1/1-2s, then s= [#permalink]
Given that \(r > 0\), s ≠ \(\frac{1}{2}\) and \(r = \frac{3s +1}{1-2s}\) and we need to find the value of s

\(r = \frac{3s +1}{1-2s}\)
=> r * (1 - 2s) = 3s + 1
=> r - 2rs = 3s + 1
=> 3s + 2rs = r - 1
=> s*(3 + 2r) = r - 1
=> s = \(\frac{r - 1}{ 3 + 2r}\)

So, Answer will be C
Hope it helps!
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Re: If r > 0, s 1/2 and r = 3s +1/1-2s, then s= [#permalink]
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