I am starting to write my thesis and was told not to use passive voice. But the active voice pronouns "I" and "we" do not sound right somehow and I even found this link How to Write... encouraging active voice yet instructing not to use first person pronouns.
So I am planing to mix active voice with passive voice, such that when I refer to my work specifically I will use passive voice and else I will use active voice. I am not a native English speaker, but in my language this sounds fine. Moreover this link Mix... says it is okay in English too.
Is this good practice in dissertations?
If not is there any other solution to this problem?
For instance in the abstract I want to say "In this thesis I prove that the...". How can I write this sentence in active voice without using I? Thanks a lot.
I believe my question is different from Style Question: Use of "we" vs. "I" vs. passive voice in a dissertation as I am asking about mixing two voices in same document specifically and not about using we vs I.