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myraweikoewgen
@myraweikoewgen
August 2021
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shevtsovavalia
4)ОДЗ: х²-6х+14>0
x²-6x+14=0
D=36-56=-20
х- любое
х²-6х+14≤9
х²-6х+5≤0
у=х²-6х+5
х²-6х+5=0
D=16
x₁=5; x₂=1
x∈[1;5]
б)㏒₃㏒₃х≤㏒₃3
х>0
(㏒₃㏒₃x-㏒₃5)/㏒₃5≤0
㏒₃5>0
㏒₃㏒₃x≤㏒₃5
㏒₃x≤5⇒x≤243
x∈(0;243]
а)㏒₅8*㏒₈11*㏒₁₁2+1=㏒₅8*㏒₅11/㏒₅8*㏒₁₁2+1=
=㏒₅11*㏒₁₁2+1=㏒₅11*㏒₅2/㏒₅11+1=㏒₅2+1=㏒₅2*㏒₅5=㏒₅10ч.т.д.
б) Простите не могу набрать основание.
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Answers & Comments
x²-6x+14=0
D=36-56=-20
х- любое
х²-6х+14≤9
х²-6х+5≤0
у=х²-6х+5
х²-6х+5=0
D=16
x₁=5; x₂=1
x∈[1;5]
б)㏒₃㏒₃х≤㏒₃3
х>0
(㏒₃㏒₃x-㏒₃5)/㏒₃5≤0
㏒₃5>0
㏒₃㏒₃x≤㏒₃5
㏒₃x≤5⇒x≤243
x∈(0;243]
а)㏒₅8*㏒₈11*㏒₁₁2+1=㏒₅8*㏒₅11/㏒₅8*㏒₁₁2+1=
=㏒₅11*㏒₁₁2+1=㏒₅11*㏒₅2/㏒₅11+1=㏒₅2+1=㏒₅2*㏒₅5=㏒₅10ч.т.д.
б) Простите не могу набрать основание.