Indicies - Answer Checks Watch

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gavo
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#1
Report Thread starter 14 years ago
#1
Hi,
Can someone just check my answers to these questions?

Evaluate:
1. (1/4) ^-1/2

= 1 / 1/4^1/2

= 1 / 2 sqroute 0.25

2. loge (1/e)

= loge -1
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Fermat
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#2
Report 14 years ago
#2
(Original post by gavo)
Hi,
Can someone just check my answers to these questions?

Evaluate:
1. (1/4) ^-1/2

= 1 / 1/4^1/2

= 1 / 2 sqroute 0.25

2. loge (1/e)

= loge -1
1.
sqroute 0.25 = ½
2 sqroute 0.25 = 2*½ = 1
1 / 2 sqroute 0.25 = 1 / 1 = 1
the siimple answer is 1 - just like you've got!

2.
loge(1/e)
loge(e^-1)
-1*loge(e)
-1*1
-1 - rather than loge(-1)
==
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jpowell
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#3
Report 14 years ago
#3
1. (1/4) ^-1/2

is the same as (4)^1/2 i.e. the square root of 4, which is 2.
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Fermat
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#4
Report 14 years ago
#4
(Original post by AntiMagicMan)
1. (1/4) ^-1/2

is the same as (4)^1/2 i.e. the square root of 4, which is 2.
Oh darn - I started at the wrong end
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