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29 Jan 2020, 02:47
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
85% (01:33) correct
15%
(01:19)
wrong
based on 107
sessions
History
Date
Time
Result
Not Attempted Yet
If p?q = p(q – p) for all values of p and q, which of the following specific operations yields 2p – 4 ?
A. (2p)?2
B. p?2
C. (2p)?p
D. 2?(2p)
E. 2?p
A. (2p)?2
B. p?2
C. (2p)?p
D. 2?(2p)
E. 2?p
29 Jan 2020, 04:52
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Bunuel
Solution
Step 1: Understand Question Statement
- • Result of operation \(p?q =p(q-p) ……………Eq. (1)\)
Step 2: Define Methodology
- • \(2p – 4\) can be written as \(2(p-2)\) which is in the similar form of Eq. (1)’s R.H.S.
Step 3: Calculate the final answer
- • On Comparing \(2(p-2)\) with RHS of Eq. (1),
- o we get \(p=2 \)and \(q=p\).
Thus, the correct answer is Option E.
Archit3110
Major Poster
29 Jan 2020, 08:10
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for given function p?q = p(q – p) we need result = 2p – 4
only possible with 2?p
IMO E
only possible with 2?p
IMO E
Bunuel
