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Bunuel
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What is (-1)*(-1)^2*(-1)^3*...*(-1)^{2019} ? 08 May 2023, 04:15
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

Difficulty:

55% (hard)

Question Stats:

59% (01:12) correct 41% (00:51) wrong based on 350 sessions

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What is \((-1)*(-1)^2*(-1)^3*…*(-1)^{2019}\)?

A. -2
B. -1
C. 0
D. 1
E. 2
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D
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What is (-1)*(-1)^2*(-1)^3*...*(-1)^{2019} ? 08 May 2023, 08:03
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Bunuel
What is \((-1)*(-1)^2*(-1)^3*…*(-1)^{2019}\)?

A. -2
B. -1
C. 0
D. 1
E. 2
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Check using small values -

\((-1)^{2019} = -1\)

again \(-1*(-1)^{2019} = 1\), Answer must be (D) 1
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What is (-1)*(-1)^2*(-1)^3*...*(-1)^{2019} ? 01 Jul 2024, 10:33
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Answer is D
The answer can either be -1 or +1 depending on power of product.. power is 1+2+3.. 2019 = (2019*2020)/2= even hence answer is +1
(for same base, exponent added when the numbers are mulitplied)
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What is (-1)*(-1)^2*(-1)^3*...*(-1)^{2019} ? 06 Jul 2024, 01:02
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Here is my explanation, hope you like it.

Posted from my mobile device
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What is (-1)*(-1)^2*(-1)^3*...*(-1)^{2019} ? 16 Nov 2025, 11:00
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