so i have my end of prelims coming up and doing a revision test. this question came up Now i thought that you would do the question like this: but it gave a different soln. am i wrong?
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Originally Posted by link0099 so i have my end of prelims coming up and doing a revision test. this question came up Now i thought that you would do the question like this: but it gave a different soln. am i wrong? Your proof is valid. The book most likely uses which of course if you divide through by gives the identity you used.
oh good, thanks a lot
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