A) \[\left( \frac{{{\alpha }^{2}}+{{\beta }^{2}}}{\alpha \beta } \right)t\]
B) \[\left( \frac{{{\alpha }^{2}}-{{\beta }^{2}}}{\alpha \beta } \right)t\]
C) \[\frac{\left( \alpha +\beta \right)t}{\alpha \beta }\]
D) \[\frac{\alpha \beta t}{\alpha +\beta }\]
Correct Answer: D
Solution :
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