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GRE practice test question that I need help figuring out...?

I took a practice test and am trying to figure out why I missed the ones I missed.

Here's the question:

The expression mRn, where m and n are positive integers, denotes that m=n^2^-1. If rRs and sRp, then in terms of p, r equals:

a. p^4^

b. p^4^-4

c. (p^2^-1)^2^-1

The right answer is C; my problem is just that I'm not understanding how the problem iw solved to begin with, if that makes sense.

2 Answers

  • 1 decade ago
    Favorite Answer

    mRn: m = n^2^-1

    rRs: r = s^2^-1

    sRp: s = p^2^-1

    r = (p^2^-1)^2^-1


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  • Anonymous
    1 decade ago

    r = s^2 - 1

    s = p^2 -1

    substitue s in eqation 1

    r = (p^2 -1)^2 -1

    hope it helps

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