• $f(x) \ge 0$ for all $x$ in the support; this is true, since $e^{-x}>0$ for all $x$ , and multiplying a positive number $x$ doesn't change this fact;

• the integral of $f(x)$ over its support is 1; this is also true, since

$\displaystyle \int_{-\infty}^\infty f(x) \, dx = \int_0^\infty xe^{-x} \, dx = 1$

which can be computed by parts.

3 0

1 year ago

There are 12 donuts in a dozen. You are allowed to eat 2. How many different combinations of donuts could

Eddi Din [679]

Answer:

Step-by-step explanation:

8 0

2 years ago

Jack typed 45 words in 1 minute. how many minutes will it take jack to type 990 words

Wittaler [7]

Answer:

22 minutes

Step-by-step explanation:

990/45=22

8 0

2 years ago

Read 2 more answers

PLEASE HELP ASAP! QUESTION IS IN THE PICTURE! 30 POINTS!

Vadim26 [7]

65 = 12.1+h the flower is 65 inches. it has grown 12.1 inches since the last time he measured it. the last time he measured it, it was height h.

65 = 12.1 + h

subtract 12.1 from both sides

65-12.1 = 12.1 + h- 12.1

52.9 = h

The last time he measured it it was 52.9 inches

5 0

2 years ago