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If one of the roots of equation 3x's Square - 5x + a = 0 is greater than - 2 and less than 0, and the other is greater than 1 and less than 3, then the range of a is? Don't use the image. Try to be more detailed, OK?
3x ^ 2-5x + a = 0x = [5 ± radical (25-12a)] / 6, one is greater than - 2 and less than 0, the other is greater than 1 and less than 3 - 2 ＜ 5-radical (25-12a)] / 6 ＜ 0, and 1 ＜ [5 + radical (25-12a)] / 6 ＜ 3-2 ＜ [5-radical (25-12a)] / 6 ＜ 0-17 ＜ - radical (25-12a) ＜ 017 ＞ radical (25-12a) ＞ 017 ^ 2 ＞ 25-12a
If one root of the quadratic equation 3x-5x + a = 0 is in (- 1,0) and the other root is in (1,3), the value range of a is obtained
Let f (x) = 3x & sup2; - 5x + a
There are known conditions: F (- 1) > 0, f (0)
(1) solve complex equation x ^ 3 + 1 = I (2) x ^ 5 = 32
Thx
1,x^3 +1=i
X ^ 3 = I-1, square of both sides at the same time: x ^ 6 = - 2I, x = root of sixth power (- 2I)
2,x^5=32
x=2
How much is 5.73 times 101 minus 5.73?
579
A is a subset of {a, B, C}. A is a subset of A. the number of a is? Please tell me the process of solving the problem
First, all subsets of {a, B, C} are listed
{a} , B}, {C}, {a, B}, {a, C}, {B, C}, {a, B, C} and empty sets
A may be one of the above sets
And ∵ A is a subset of A
A = a or a = empty set
The number of sets a is two
Remember two key concepts for finding subsets:
1. Any set is a subset of itself
2. An empty set is a subset of any set
Solving equation 2 ^ 2x = 2 ^ x + 56
Let a = 2 ^ X
Then a & # 178; = a + 56
a²-a-56=(a-8)(a+7)=0
a=2^x>0
SO 2 ^ x = a = 8
So x = 3
A fifth is a fraction minus a fraction minus a fraction
A half is a fraction plus a fraction plus a fraction plus a fraction plus a fraction plus a fraction plus a fraction
The number must not be repeated
1/5=1/3-1/12-1/20
1/2=1/3+1/9+1/27+1/54
Solving one variable linear equation with half X-7 = 5 + X
Half X-7 = 5 + X
x-14=10+2x
x-2x=10+14
-x=24
x=-24
sin0°=?
Draw an image
The answer is 0
How to solve 36-x = 0.4 equation
X=36-0.4
X=35.6
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