a) A=\(\frac16\)

b) B=\(\frac{\sqrt{x}+1}{\sqrt{x}_{}-1}\)

c) P = A.B = \(\frac{x}{\sqrt{x}-1}\) ta co P\(\le\) 4

nen thay P vao ta co x=4

a) A=\(\frac16\)

b) B=\(\frac{\sqrt{x}+1}{\sqrt{x}_{}-1}\)

c) P = A.B = \(\frac{x}{\sqrt{x}-1}\) ta co P\(\le\) 4

nen thay P vao ta co x=4

a) A=\(\frac16\)

b) B=\(\frac{\sqrt{x}+1}{\sqrt{x}_{}-1}\)

c) P = A.B = \(\frac{x}{\sqrt{x}-1}\) ta co P\(\le\) 4

nen thay P vao ta co x=4

xac suat la 1/3

25%

p=(x​+24x​​+4−x8x​):(x−2x​x​−1​−x​2​)=(x​+24x​​−x−48x​):[x​⋅(x​−2)x​−1​−x​2​]=[x​+24x​​−(x​−2)(x​+2)8x​]:[x​⋅(x​−2)x​−1​−x​2​]=[(x​−2)(x​+2)4x​⋅(x​−2)−8x​]:[x​⋅(x​−2)x​−1−2⋅(x​−2)​]=[(x​−2)(x​+2)4x−8x​−8x​]:[x​⋅(x​−2)x​−1−2x​+4​]=[(x​−2)(x​+2)−4x−8x​​]:[x​⋅(x​−2)−x​+3​]

=[−4x⋅(x+2)(x−2)(x+2)]:[−x+3x⋅(x−2)]=−4xx−2⋅x⋅(x−2)−x+3=−4x−x+3=4xx−3=[(x​−2)(x​+2)−4x​⋅(x​+2)​]:[x​⋅(x​−2)−x​+3​]=x​−2−4x​​⋅−x​+3x​⋅(x​−2)​=−x​+3−4x​=x​−34x​