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Mathematics 11 Online
OpenStudy (anonymous):

Can someone check this for me pls?(What type of proof is this?) Pic below

OpenStudy (anonymous):

OpenStudy (anonymous):

Ive got law of detachment as an answer.. but i think its incorrect.

ganeshie8 (ganeshie8):

you're assuming the opposite of q to be true. so this is 'proof by contradiciton'

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