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☆1 inequalities
[ 1/1Inequality]
Assignment:Find the solution set of inequality log(2,n+1) <= 2log(2,n)^2 .
Question type: Inequality
Solution:
The inequality can be reduced to 1 inequality:
log( 2 , n + 1 ) <= 2 * log( 2 , n ) ^ 2 (1)
From the definition field of log
2 > 0 (2 )
x + 1 > 0 also ≠ 1 (3 )
From the definition field of log
2 > 0 (4 )
x > 0 并且 ≠ 1 (5 )
From inequality(1):
n ≤ 0.657968 或 n ≥ 1.821308
From inequality(2):
n ∈ R (R is all real numbers),that is, in the real number range, the inequality is always established!
From inequality(3):
-1 < n < 0 或 n > 0
From inequality(4):
n ∈ R (R is all real numbers),that is, in the real number range, the inequality is always established!
From inequality(5):
0 < n < 1 或 n > 1
From inequalities (1) and (2)
n ≤ 0.657968 或 n ≥ 1.821308 (6)
From inequalities (3) and (6)
-1 < n < 0 或 0 < n ≤ 0.657968 或 n ≥ 1.821308 (7)
From inequalities (4) and (7)
-1 < n < 0 或 0 < n ≤ 0.657968 或 n ≥ 1.821308 (8)
From inequalities (5) and (8)
≤ n ≤ 或 0 < n ≤ 0.657968 或 n ≥ 1.821308 (9)
The final solution set is :
≤ n ≤ 或 0 < n ≤ 0.657968 或 n ≥ 1.821308Your problem has not been solved here? Please take a look at the hot problems !