Are u able to take a picture of the whole question?
41
3 times 9 is 27
27+14=41
Answer:
A. 1/5
B. 1/2
C. 2/3
D. 3/5
E. 2/3
F. 3/8
G. 4/11
H. 3/7
I. 5/6
J. 4/11
K. 2/5
L. 1/4
Q. 27/36 = 3/4
Step-by-step explanation:
Answer:
(B) π/12 + π/6 k
Step-by-step explanation:
Points of inflection are where f"(x) = 0 and changes signs.
f(x) = cos²(3x)
f(x) = (cos(3x))²
f'(x) = 2 (cos(3x))¹ × -sin(3x) × 3
f'(x) = -6 sin(3x) cos(3x)
Using double angle formula:
f'(x) = -3 sin(6x)
f"(x) = -3 cos(6x) × 6
f"(x) = -18 cos(6x)
0 = -18 cos(6x)
0 = cos(6x)
6x = π/2 + 2πk or 6x = 3π/2 + 2πk
We can simplify this to:
6x = π/2 + πk
x = π/12 + π/6 k
