The expression which gives the length of the transverse axis of the hyperbola is; Choice D; a-b.
Which expression gives the length of the transverse axis of the hyperbola?
The transverse axis is by definition, a line segment that passes through the center of the hyperbola and has vertices as its endpoints. The foci therefore lies on the line that contains the transverse axis. Hence, it follows that the correct answer choice is; a-b.
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