Find the solution to the initial value problem:
x'' + 16x = (? +4)cos ? tx(0) = 0 x'(0) = 0x(t) =
write x(t) as a product of two sines, one with the beat (slow) frequency (? ? 4)/2, and the other with the carrier (fast) frequency (? + 4)/2.x(t) =
the solution x(t) is really a function of two variables t and ? . compute the limit of x( as ? approaches 4 (your answer should be a function of t).lim ? ? 4 x( =
define y(t) = lim ? ? 4 x( what differential equation does y(t) satisfy? y'' + =