. Cho hàm f xác định bởi chuỗi lũy thừa 2 1
0
1
2 1!
k k
k
x
f x k
f

¦
với mọi x. Chứng minh rằng f x fx '' với mọi x

Aright triangle includes one angle that measures 30º. what is the measure of the third angle? a. 30º b. 90º c. 60º d. 130º

Brent needs to paint a logo made using two right triangles. the dimensions of the logo are shown below. what is the difference between the area of the large triangle and the area of the small triangle? (1 point) select one: a. 4.5 cm2 b. 8.5 cm2 c. 16.5 cm2 d. 33.0 cm2

In the 30-60-90 triangle below side s has a length of and side r has a length