given that y2 + 1/y2 = 119, find the value of y + 1/y
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Answer:
y+1/y =11
Step-by-step explanation:
(y+1/y)^2=y^2+1/y^2+2*y*1/y
=119+2=>121 since y^2+1/y^2=119
y+1/y=\sqrt{121} =>11
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