Overview: 2 questions will be solved this time.Among them
           ☆2 inequalities

[ 1/2Inequality]
    Assignment:Find the solution set of inequality 2π/w*3/4 >7π/10 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        2 * π / w * 3 / 4 >7 * π / 10         (1)
        From the definition field of divisor
        x ≠ 0        (2 )

---

    From inequality(1)：
         0 < w < 15/7
    From inequality(2)：
         w < 0 或  w ＞ 0

---

    From inequalities (1) and (2)
         0 < w < 15/7     (3)

---

    The final solution set is :
         0 < w < 15/7
[ 2/2Inequality]
    Assignment:Find the solution set of inequality 2π/w*5/4 <17π/10 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        2 * π / w * 5 / 4 <17 * π / 10         (1)
        From the definition field of divisor
        x ≠ 0        (2 )

---

    From inequality(1)：
         w < 0 或  w ＞ 1.470588
    From inequality(2)：
         w < 0 或  w ＞ 0

---

    From inequalities (1) and (2)
         w < 0 或  w ＞ 1.470588    (3)

---

    The final solution set is :
         w < 0 或  w ＞ 1.470588

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