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Define x* by the equation x* = π/x. Then ((–π)*)* =
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04 Apr 2018, 12:48
04 Apr 2018, 12:48
1
Expert Reply
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Question Stats:
90% (00:43) correct
10% (01:07) wrong based on 60 sessions
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Define \(x^*\) by the equation \(x^* = \frac{\pi}{x}\). Then \(((-\pi)^*)^*\) =
A. \(\frac{-1}{\pi}\)
B. \(\frac{-1}{2}\)
C. \(- \pi\)
D. \(\frac{1}{\pi}\)
E. \(\pi\)
A. \(\frac{-1}{\pi}\)
B. \(\frac{-1}{2}\)
C. \(- \pi\)
D. \(\frac{1}{\pi}\)
E. \(\pi\)
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Joined: 15 Jan 2018
Posts: 147
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Re: Define x* by the equation x* = π/x. Then ((–π)*)* =
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04 Apr 2018, 20:20
04 Apr 2018, 20:20
2
Expert Reply
In a problem like this, simply do a find and replace with the x into whatever the function is. In this case, every time you see an *, replace whatever is under it with the x in the given function. Since this one is nested in two sets of parenthesis, let's do the inside set first.
The inside-most function is -π*, so we should replace the x in the given function with -π. Thus, we get:
π/-π = -1
Now, the outer-most function is whatever result we got from the last function. So we have -1*. Repeat:
π/-1 = -π
So the answer is C.
The inside-most function is -π*, so we should replace the x in the given function with -π. Thus, we get:
π/-π = -1
Now, the outer-most function is whatever result we got from the last function. So we have -1*. Repeat:
π/-1 = -π
So the answer is C.
Re: Define x* by the equation x* = π/x. Then ((–π)*)* =
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03 Nov 2019, 05:44
03 Nov 2019, 05:44
still can,t understand, someone help me please in an another way.
