Answer: The answer is D
Step-by-step explanation: I just did the question.
Answer:
n= -50/8
Step-by-step explanation:
(5^-2)= (1/5^2)... (1/25) now cube that so it will be 1/15625. Hope that helps
Step-by-step explanation:
You have to do first and second derivatives :
y = a sin 3x + b cos 3x
dy/dx = 3a cos 3x - 3b sin 3x
d²y/dx² = - 9a sin 3x - 9b cos 3x
Next, you have to compare it :
let d²y/dx² = ky,
-9a sin 3x - 9b cos 3x = k(a sin 3x + b cos 3x)
-9(a sin 3x + b cos 3x) = k(a sin 3x + b cos 3x)
Therefore, k is equals to 9.
