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You know the one that they give you in the test? Please urgent! 3AM NOW LOL, still trying to cram 2 years worth of knowledge for at the very least a 70% :(

I remember the teacher taught us an easier method to do it rather than 2f(a+h), 2f(a+2h), etc when doing more than one intervals. Can someone post the formula? Cause my calculator can't fit all the working out especially when they usually ask for ten intervals...

thanks

How do I solve this? I can't seem to factorise because of the one. I know the answer but need formula/method to solve!!

Would I lose marks? I sometimes jump from steps messily but I show all the important working out. It's sometimes hard to read my train of thought through my working out.

fukc memorising three essays i'm WRITING three essays from scratch tonight AND memorising