Question

Radical din baza 3 1-x=-2

Answer 1

Răspuns:

Explicație pas cu pas:

rad din baza 3(1-x)=-2

1-x=-2³

1-x=-8

-x=-8-1

-x=-9

x=9

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Answer 2

 

$\displaystyle\bf\\\sqrt[\b3]{\bf1-x}=-2 ~~\Big|~~~~~Ridicam~la~puterea~a~3-a\\\\\Big(\sqrt[\b3]{\bf1-x}\Big)^3=\Big(-2\Big)^3\\\\1-x=-8~~~\Big|~~\cdot(-1)\\\\x-1=8\\\\x=8+1\\\\\boxed{\bf~x=9}\\\\\\Verificare:\\\\\sqrt[\b3]{\bf1-x}=\sqrt[\b3]{\bf1-9}=\sqrt[\b3]{\bf-8}=-2~~~~(Corect)$