Mathematics
Senior High

1と2を教えてください
お願いします

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Answers

(1)3<√10<4
3+1<1+√10<4+1
4<1+√10<5
a=4
b=1+√10-4=√10-3
(2)b+1/b=(√10-3)+(√10+3)=2√10

b^2+1/b^2=(b+1/b)^2-2=(2√10)^2-2=40-2=38

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