Overview: 1 questions will be solved this time.Among them
           ☆1 inequalities

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 0.9 <1/(((1-x^2)^2+(1.3*x)^2)^0.5) <1.1 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        0.9 <1 / ( ( ( 1 - x ^ 2 ) ^ 2 + ( 1.3 * x ) ^ 2 ) ^ 0.5 )         (1)
        1 / ( ( ( 1 - x ^ 2 ) ^ 2 + ( 1.3 * x ) ^ 2 ) ^ 0.5 ) <1.1         (2)
        From the definition field of divisor
         ( ( 1 - x ^ 2 ) ^ 2 + ( 1.3 * x ) ^ 2 ) ^ 0.5 ≠ 0        (3 )

---

    From inequality(1)：
         -0.814568 < x < 0.814568
    From inequality(2)：
         x ∈ R (R is all real numbers),that is, in the real number range, the inequality is always established!
    From inequality(3)：
         x ∈ R （R为全体实数），即在实数范围内，不等式恒成立！

---

    From inequalities (1) and (2)
         -0.814568 < x < 0.814568     (4)
    From inequalities (3) and (4)
         -0.814568 < x < 0.814568     (5)

---

    The final solution set is :
         -0.814568 < x < 0.814568

Your problem has not been solved here? Please take a look at the  hot problems ！