Allow me to elaborate on the title. So the new syllabus has introduced a new topic called “nature of proof” which basically consists of proving problems. At tutor, I was told that according to NESA, you are not allowed to assume something is true and work backwards to the end. However, at school when doing a proving question, my teacher often just write what we're required to prove first and do it backwards until we reach something that is obviously true such as 1>0. Then at the end of the step, he writes "Reverse the steps to get the proof required". I'm really perplexed by that and wonder who I should listen to. I will attach a handwritten example on my school teacher's method to further clarify my query.
Thank you so much in advance!
Thank you so much in advance!
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