Try redo-ing your calculations. Your equation in your first post seems to be correct. I plugged the values in and worked it out on a calculator. My answer is 7.032k.
LTSpice is the best free circuit simulator available on the web; better than ones that charge $20000
I put the network into LTSpice, and force 1Adc through the network. Since the voltage at Node 4 is 7031.87V, then it follows that the equivalent resistance from N4 to GND is 7031.87V/1A = 7031.87Ω
You can get readout directly in Ohms by doing the math in the waveform display. This can be done with either a voltage source or a current source. Of course, it is no better than Mike's method, but it is interesting that the display will plot resistance on the vertical axis.
And, it is handy for plotting impedance between nodes in a circuit.
With my "paper & pen" (actually excel spreadsheet) it is 7031.87384179803Ω using your equation, which is correct. It's all about the number of decimal places used.
That's weird because my 6.35k value was correct according to the teacher and my classmate. There's no way a decimal could cause a 682 ohms differance..
!
That's weird because my 6.35k value was correct according to the teacher and my classmate. There's no way a decimal could cause a 682 ohms differance..
!
That's weird because my 6.35k value was correct according to the teacher and my classmate. There's no way a decimal could cause a 682 ohms differance..
!
Are 10 digits after the decimal point so accurate ? On resistors with like 10 000 ohms, I would think that the pico values are washed away by the % of precision of that resistance by far.
If the resistors have a 1% error margin, the resistors of ' R1 || R2 = 10476.2R 10476.1904761905 ohms ' could vary of 104,761904762 ohms lol