My question is shown in the figure. After a divide-by-2 frequency divider, clk_1 will turned to be clk_1' which has half frequency of clk_1. clk_1 and clk_1' have the same waveform.
Now, if clk_2 is input to the same divide-by-2 frequency divider, what will be the output clk_2'? What will be the waveform of clk_2'?