roor 72+ under root 72 +.....infinity (-) root 42+ under root 42...infinity=? and explain
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let y=√(72+√(72+√(72..........infinity
y=✓(72+y)
y^2-y-72=0
y=(1+√(1+288))/2
similarly X=√(42+√(42.......
x=√(42+x)
x=(1+√(1+168))/2
y-x=(√289 - √169)/2
= (17-13)/2=2
y=✓(72+y)
y^2-y-72=0
y=(1+√(1+288))/2
similarly X=√(42+√(42.......
x=√(42+x)
x=(1+√(1+168))/2
y-x=(√289 - √169)/2
= (17-13)/2=2
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