Question

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• A£® $\frac{x_1}{x_2}=\frac{t_1}{t_2}$
• B£® $\frac{a_1}{a_2}=\frac{t_1}{t_2}$
• C£® $\frac{x_1}{t_1}=\frac{x_2}{t_2}=\frac{{{x_1}+{x_2}}}{{{t_1}+{t_2}}}$
• D£® v=$\frac{{2£¨{x_1}+{x_2}£©}}{{{t_1}+{t_2}}}$

Answer 1

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