[填空题]
The capacitance of a portion oftfo++ o4ijy( rpxl .b 1x6awe. a circuit is to be reduced f96jl 20/iqolpw h5kwcrom 4800 pF to 2900 pF20wwpk jq9/5ilo cl6 h.
What capacitance can be added to the circuit to produce this effect without removing existing circuit elements? $ \times10^{ -9}\;F$
Must any existing connections be broken in the process?