I begin with switching off the signal and opening all capacitors
The transistors are identical, both with beta of 150.
I then assume Q1 and Q2 are in forward active mode, and arrive at the following:
Vc - VBE2 + r4* ix = 0 ---> (1)
Vc - VBE2 -iy* R6 - VBE2 - R3* ix = 0 --- >(2)
ix = 151*iy ---> (3)
Solving the above in Wolfram, I find that both ix and iy are negative. What do I do then? Does it mean Q1 is not forward active, and all the assumptions are wrong?
I hate to ask a "please check my calculations" sort of question, but I've verified the steps again and again for hours and am getting nowhere.
Please enlighten me!