the sum of two numbers is 8 and the sum of their reciprocals is 8/15 find the numbers
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Answered by
1
Answer:
I don't know..........
Answered by
1
Step-by-step explanation:
let the first no. be x
let the second no. be y
ATQ
x+y=8
1/x+1/y=8/15
y+x/xy=8/15
because x+y=8
so 8/xy=8/15
canceling 8 from both side
1/xy=1/15
xy=15
(x+y=8
x=y-8)
putting value of x
y(y-8)=15
y2-8y=15
y2-8y-15=0
spliting middle term
y2-5y+3y-15=0
taking common
y(y-5)3(y-5)
(y+3)(y-5)
y=-3, y=5
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