Answer:
The answer is .
Step-by-step explanation:
First, it is important to recall that the group law is not commutative in general, so we cannot assume it here. In order to solve the exercise we need to remember the axioms of group, specially the existence of the inverse element, i.e., for each element there exist another element, denoted by such that , where stands for the identity element of G.
So, given the equality we make a left multiplication by and we obtain:
But, . Hence, .
Now, in the equality we make a right multiplication by , and we obtain
.
Recall that and . Therefore,
.
Answer:
6
Step-by-step explanation:
The law of cosines is useful here.
a^2 = 8^2 +11^2 -2·8·11·cos(32.2°) ≈ 36.070003
a ≈ √36.070003 ≈ 6.00583
a ≈ 6
ANSWER
Focus:
Directrix:
EXPLANATION
The given parabola has equation:
We compare this to the general equation,
Comparing the coefficient of x, we have:
-4p=-1
The focus is (-p,0)
The equation of the directrix is
x=p
Solve 3x−5 = 9:
Add 5 to both sides, to isolate 3x on the left side: 3x = 5+9 = 14
Solve this for x: x = 14/3