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As j increases from 135 to 136, which of the following must decrease?
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01 Aug 2021, 20:59
01 Aug 2021, 20:59
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Question Stats:
89% (01:09) correct
10% (01:39) wrong based on 28 sessions
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As j increases from 135 to 136, which of the following must decrease?
I. \(1 − j^2\)
II. \(j − j^2\)
III. \(\frac{1}{j^2}
\)
(A) I only
(B) II only
(C) I and II
(D) I and III
(E) I, II and III
I. \(1 − j^2\)
II. \(j − j^2\)
III. \(\frac{1}{j^2}
\)
(A) I only
(B) II only
(C) I and II
(D) I and III
(E) I, II and III
As j increases from 135 to 136, which of the following must decrease?
[#permalink]
01 Aug 2021, 21:41
01 Aug 2021, 21:41
2
1
I) \(1 − j^2\) = \((1 + j)(1 - j)\)
for \(135\) :: \((-134)(136) = -18224\)
for \(136\) :: \((-135)(137) = -18495\)
II) \(j − j^2\) = \(j(1 - j)\)
for \(135\) :: \((135)(-134) = -18090\)
for \(136\) :: \((136)(-135) = -18225\)
III) \(\frac{1}{j^2}\) - the denominator increases hence the value will decrease.
Answer E
for \(135\) :: \((-134)(136) = -18224\)
for \(136\) :: \((-135)(137) = -18495\)
II) \(j − j^2\) = \(j(1 - j)\)
for \(135\) :: \((135)(-134) = -18090\)
for \(136\) :: \((136)(-135) = -18225\)
III) \(\frac{1}{j^2}\) - the denominator increases hence the value will decrease.
Answer E
gmatclubot
As j increases from 135 to 136, which of the following must decrease? [#permalink]
01 Aug 2021, 21:41
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