Answer:
I think its 3 but i might be wrong
Step-by-step explanation:
Hope this helps
+∞
∫ x · e ^(-x² ) dx = / The substitution: u = - x², x d x = - du / 2
-∞
+∞
= - 1/2 · ∫ e ^(u) du = - 1/2 · e ^(-x²) /
- ∞
e^(-∞) = 1 / e^(∞)
= -1/2 · [ 1/ e^(∞) - 1/ e^(∞) ] = -1/2 · ( 0 - 0 ) = 0
Answer:
14/9
Step-by-step explanation:
7/18 + 1/3+ 5/6
1/3 can also be written as 6/18
5/6 can also be written as 15/18
7/18 + 6/18 + 15/8 = 28/18
28/18 can be simplified to 14/9
Hope this helps!
