y2 = 10
work these out by the given information above :
y^4 = _ <- what?
Y^_ = 1000 <-what help
maths help?
2008-04-05 4:40 pm
回答 (6)
2008-04-05 5:00 pm
✔ 最佳答案
Here's how we'd break that down in my pre-algebra class.1. y=5
y2=5*2 which equals 10
2. y=7
7*7*7*7=2,401
3.y=7
1,000/7 equals 0.007
Hope that's helpful.
I double checked my answers with my pc's calc.
-Sarah-
2008-04-06 12:41 am
y^2 = 10
y^4 = 10^2 = 100
y^x = 1000
y^x = y^6
x = 6
y^4 = 10^2 = 100
y^x = 1000
y^x = y^6
x = 6
2008-04-05 11:54 pm
y^2=10
y=sqrt. 10
y=3.16
y^4=99.71
y=sqrt. 10
y=3.16
y^4=99.71
2008-04-05 11:50 pm
first solve for "y" in the first equation
y^2 = 10, sqrt both sides
â y^2 = â10, simplify
y = â10
the second equation is to plug in â10 for y
y^4 = x
â10^4 = x
â1000 = x
100 = x, answer
y^x = 1000, plug in y
â10^x = 1000, square both sides
10^x = 1000^2
x*log10 = 2*log 1000, add log to get x out of the exponential form
x = 2*log1000 / log 10
i don't have a calculator on me so... you got to do the final step
y^2 = 10, sqrt both sides
â y^2 = â10, simplify
y = â10
the second equation is to plug in â10 for y
y^4 = x
â10^4 = x
â1000 = x
100 = x, answer
y^x = 1000, plug in y
â10^x = 1000, square both sides
10^x = 1000^2
x*log10 = 2*log 1000, add log to get x out of the exponential form
x = 2*log1000 / log 10
i don't have a calculator on me so... you got to do the final step
2008-04-05 11:46 pm
If you're given y^2=10, y=Sqrt[10]=10^1/2
y^4 = (10^1/2)^4 = 10^2=100
y^x=1000
(10^1/2)^x=1000
10^x/2=1000
Log 10^x/2 = Log 1000
x/2=3
x=6
y^6=1000
y^4 = (10^1/2)^4 = 10^2=100
y^x=1000
(10^1/2)^x=1000
10^x/2=1000
Log 10^x/2 = Log 1000
x/2=3
x=6
y^6=1000
2008-04-05 11:44 pm
y^4 = (y^2)^2 = 100
100 * 10 = 1000 = y^4 * y^2 = y^6
100 * 10 = 1000 = y^4 * y^2 = y^6
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