write the equation of x-axis , if the points ( 1,0 ) and ( 2 , 1) lie on the graph of x/a + y/b = 1 , then find the values of a and b
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1/a + 0/b = 1
a= 1
2/a + 1/b = 1
2/1 + 1/b = 1
1/b = -1 , b= -1
a= 1
b = -1
a= 1
2/a + 1/b = 1
2/1 + 1/b = 1
1/b = -1 , b= -1
a= 1
b = -1
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