Answers

2016-03-13T16:15:05+05:30
(2a,4) and (-2,2b)
- midpoint 
(2a-2/2) ,(4+2b/2)
(a-1) and (2+b)
a-1= 1    a=2
2(2)+1 = 4+1 = 5
b=5
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