consider the straight lines L1:y=2x+1 and L2:y=2x-7 (a) show that L1 and L2 are parallel?

2015-08-27 1:57 pm

回答 (1)

2015-08-27 2:13 pm
m of L1=2
m of L2=2
So L1 and L2 are parallel


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