Step-by-step explanation:
x⁴ - 6x² + 8
= (x² - 4)(x² - 2)
= (x + 2)(x - 2)(x² - 2).
Answer:
Step-by-step explanation:
The pdf of X is given by 3e^x(1-e^-2y). Please check the screenshot for the workings.
The pdf of Y is given by 6e^-2y. Please check the screenshot for the workings.
The expected time the device fails is the expected time Y fails, so we are going to find the expected time of Y which equals to 0.83.
Please check the screenshop for the workings. Thanks
Answer:
the first one?
Step-by-step explanation:
he went up 9 floors so you'd add 9 and down 7 floors so you'd subtract
2^-2 = 1/2^2
so: (1/2^2)*(12*3)-5^3
simplify: (1/4)*36-125
36*(1/4) = 36/4 so: 9-125
subtract: -116