I have uploaded my question in the attachment here which is called proofs - please have a look and let me know if u know the answer - I need it really urgently.
Thanks,
jawabe soal 6.pdf - This is what I have done for the first part - and for the second part I know that I am supposed to square the whole of the second part of the question and then I will get 1/the exact denominator of the second part of the question but I am not sure if thats correct and the third part I just dont have a clue...
Thanks!