I don\'t understand how to figure this out, our instructor neverexplained it to

Question

I don't understand how to figure this out, our instructor neverexplained it to us.

A pair of speakers connected to the same sound system face eachother, one at x = 0 and the other at x =4.50 m. If they are playing a soundwith frequency 359 Hz, what are thefirst three points of constructive interference between the twospeakers starting from x = 0? (Take the speed of sound as343 m/s.)
points 1st closest to x = 0                  m
2nd closest to x = 0 2 m 3rd closest to x = 0 3 m
points 1st closest to x = 0                  m
2nd closest to x = 0 2 m 3rd closest to x = 0 3 m
points 1st closest to x = 0                  m
2nd closest to x = 0 2 m 3rd closest to x = 0 3 m

Explanation / Answer

The wave length of that sound =v/f so =343/359=0,955. The inteference pattern of two source of sound have a constructivepoint at the middle and other point have the distance to the midpoint of /2 draw a pattern of constructive interference with a mid point andother point as decribed above. You should obtain the the value of x when you look at thepattern

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