the sum of two numbers r9.sum of reciprocals r 1/2
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Let one number be X and another be Y
Given that
X +Y =9....................(1)
1/X +1/Y =1/2
2x+2Y = XY.................(2)
Multiplying equation (1) by 2 it gives
2X +2Y =18.................(3)
Given that
X +Y =9....................(1)
1/X +1/Y =1/2
2x+2Y = XY.................(2)
Multiplying equation (1) by 2 it gives
2X +2Y =18.................(3)
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