Răspuns:
Explicație pas cu pas:
x/y = 1/2
y/z = 2/5
x/t = 5/8
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x/z = ? ; xy / zt = ? ; xz / y² = ?
t/y = ? ; x²/yt = ? ; y² /xz = ?
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x/y = 1/2 => y = 2x
y/z = 2/5 => z = 5y/2 => z = 5·2x/2 => z = 5x
x/t = 5/8 => t = 8x/5
x/z = x/5x =>
x/z = 1/5
xy/zt = x·2x / (5x·8x:5) = 2x²/8x² = 2/8 = 1/4
xy/zt = 1/4
xz / y² = x·5x / (2x)² = 5x²/4x² = 5/4
xz / y² = 5/4
t/y = (8x/5) : 2x = 8x/10x = 8/10 = 4/5
t/y = 4/5
x²/yt = x²/(2x·8x/5) = x²/(16x²:5) = x²·5/16x² = 5/16
x²/yt = 5/16
y² /xz = (2x)² /(x·5x) = 4x²/5x² = 4/5
y² /xz = 4/5
#copaceibrainly