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☆1 inequalities
[ 1/1Inequality]
Assignment:Find the solution set of inequality e^{((lnx)/x^(1/2))+((lnx)/(x^(1/8)))}*e^((lnx/(x^(1/8))))+e^((lnx)/(x^(1/2))) >2e^((lnx/(x^(1/8)))) .
Question type: Inequality
Solution:
The inequality can be reduced to 1 inequality:
e ^ ( ( ( ln x ) / x ^ ( 1 / 2 ) ) + ( ( ln x ) / ( x ^ ( 1 / 8 ) ) ) ) * e ^ ( ( ln x / ( x ^ ( 1 / 8 ) ) ) ) + e ^ ( ( ln x ) / ( x ^ ( 1 / 2 ) ) ) >2 * e ^ ( ( ln x / ( x ^ ( 1 / 8 ) ) ) ) (1)
From the definition field of ln
x > 0 (2 )
From the definition field of divisor
x ≠ 0 (3 )
From the definition field of ln
x > 0 (4 )
From the definition field of divisor
x ^ ( 1 / 8 ) ≠ 0 (5 )
From the definition field of ln
x > 0 (6 )
From the definition field of divisor
x ^ ( 1 / 8 ) ≠ 0 (7 )
From the definition field of ln
x > 0 (8 )
From the definition field of divisor
x ^ ( 1 / 2 ) ≠ 0 (9 )
From the definition field of ln
x > 0 (10 )
From the definition field of divisor
x ^ ( 1 / 8 ) ≠ 0 (11 )
From inequality(1):
x ∈ R (R is all real numbers),that is, in the real number range, the inequality is always established!
From inequality(2):
x > 0
From inequality(3):
x < 0 或 x > 0
From inequality(4):
x > 0
From inequality(5):
x ∈ R (R为全体实数),即在实数范围内,不等式恒成立!
From inequality(6):
x > 0
From inequality(7):
x ∈ R (R为全体实数),即在实数范围内,不等式恒成立!
From inequality(8):
x > 0
From inequality(9):
x ∈ R (R为全体实数),即在实数范围内,不等式恒成立!
From inequality(10):
x > 0
From inequality(11):
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)
x > 0 (12)
From inequalities (3) and (12)
x > 0 (13)
From inequalities (4) and (13)
x > 0 (14)
From inequalities (5) and (14)
x > 0 (15)
From inequalities (6) and (15)
x > 0 (16)
From inequalities (7) and (16)
x > 0 (17)
From inequalities (8) and (17)
x > 0 (18)
From inequalities (9) and (18)
x > 0 (19)
From inequalities (10) and (19)
x > 0 (20)
From inequalities (11) and (20)
x > 0 (21)
The final solution set is :
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