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Overview: 1 questions will be solved this time.Among them
☆1 inequalities
[ 1/1Inequality]
Assignment:Find the solution set of inequality 1/(1+x^(1/8))
Question type: Inequality
Solution:
The inequality can be reduced to 1 inequality:
1 / ( 1 + x ^ ( 1 / 8 ) ) < ln x / x ^ ( 1 / 2 ) (1)
From the definition field of divisor
1 + x ^ ( 1 / 8 ) ≠ 0 (2 )
From the definition field of ln
x > 0 (3 )
From the definition field of divisor
x ≠ 0 (4 )
From inequality(1):
x > 1.95346
From inequality(2):
x ∈ R (R为全体实数),即在实数范围内,不等式恒成立!
From inequality(3):
x > 0
From inequality(4):
x < 0 或 x > 0
From inequalities (1) and (2)
x > 1.95346 (5)
From inequalities (3) and (5)
x > 1.95346 (6)
From inequalities (4) and (6)
x > 1.95346 (7)
The final solution set is :
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