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With R1 o/c there is no
voltage on the base, no
base bias and no base
current.
The transistor is OFF
and there is no
collector current and no
voltage drop across R3.
The collector voltage
will be the same as the
supply volts, +9.
There is no current
through R4, so there is
no voltage drop across
it.
The voltage at both ends
is the same, zero volts.
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