Whakaoti mō x
x\in \begin{bmatrix}-\frac{\sqrt{7}}{7},\frac{\sqrt{7}}{7}\end{bmatrix}
Graph
Tohaina
Kua tāruatia ki te papatopenga
-1+7x^{2}\leq 0
Me whakarea te koreōrite ki te -1 kia tōrunga ai te tau whakarea o te pū tino teitei i 1-7x^{2}. I te mea he tōraro a -1, ka huri te ahunga koreōrite.
x^{2}\leq \frac{1}{7}
Me tāpiri te \frac{1}{7} ki ngā taha e rua.
x^{2}\leq \left(\frac{\sqrt{7}}{7}\right)^{2}
Tātaitia te pūtakerua o \frac{1}{7} kia tae ki \frac{\sqrt{7}}{7}. Tuhia anō te \frac{1}{7} hei \left(\frac{\sqrt{7}}{7}\right)^{2}.
|x|\leq \frac{\sqrt{7}}{7}
E mau ana te koreōrite mō |x|\leq \frac{\sqrt{7}}{7}.
x\in \begin{bmatrix}-\frac{\sqrt{7}}{7},\frac{\sqrt{7}}{7}\end{bmatrix}
Tuhia anō te |x|\leq \frac{\sqrt{7}}{7} hei x\in \left[-\frac{\sqrt{7}}{7},\frac{\sqrt{7}}{7}\right].
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