# Its part 1.....

Algebra Level 5

$$x^4+(1-2k)x^2+k^2-1=0$$, where $$k$$ is real. If $$x^2$$ is imaginary, or $$x^2<0$$, the equation has no real roots.If $$x^2>0$$, the equation has real roots

The equation has no real roots if $$k\in$$

$$A)$$- $$(-\infty,-1)$$

$$B)$$- $$(-1,1)$$

$$C)$$- $$(1,\frac{5}{4})$$

$$D)$$- $$(\frac{5}{4},\infty)$$

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