If I write the transfer function I can clearly see a zero at zero frequency and a pole at 1/2πRC frequency. But If I simply look at this circuit I would say that there is one pole and no zero(as there is only one path from input to output(that's one technique I learnt in my engineering)). Is there any intuitive explanation of this zero or am I ma[![enter image description here](https://i.stack.imgur.com/JwRT3.jpg)](https://i.stack.imgur.com/JwRT3.jpg)king some mistake? Please explain.