Answer:
Eq: (x+a/2)²+(y+1)²=(a²-8)/4
Center: O(-a/2, -1)
Radius: r=0.5×sqrt(a²-8)
Mandatory: a>2×sqrt(2)
Step-by-step explanation:
The circle with center in O(xo,yo) and radius r has the equation:
(x-xo)²+(y-yo)²=r²
We have:
x²+y²+ax+2y+3=0
But: x²+ax=x²+2(a/2)x+a²/4-a²/4= (x+a/2)²-a²/4
And
y²+2y+3=y²+2y+1+2=(y+1)²+2
Replacing, we get:
(x+a/2)²-a²/4+(y+1)²+2=0
(x+a/2)²+(y+1)²=a²/4-2=(a²-8)/4
By visual inspection we note that:
- center of circle: O(-a/2, -1)
- radius: r=sqrt((a²-8)/4)=0.5×sqrt(a²-8). This means a²>8 or a>2×sqrt(2)
M/7 would be the correct answer
Answer:
0.7
Step-by-step explanation:
Probability of defective = 0.7
P(non-defective) = 1 - 0.7 = 0.3
Let X be the trial at which we get the first non-defective
Then X follows a geometric distribution.
X ~ Geo (0.3)
What has happened already will not affect the probability.
P(atleast 2 more) = P(X > 1)
= 1 - P(X = 1)
= 1 - (0.3)
= 0.7
Answer:
D ko alam HAHAHAHA bahala kang bobo ka HAHAHAHAHAHAHA
Step-by-step explanation:
Tanong mo kay ser kung anong sagot potanginamo ka
