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Question Number 30092 by math1967 last updated on 16/Feb/18
Ifx+1x=3findx5+1x5
Answered by math1967 last updated on 16/Feb/18
x+1x=3∴x2+1x2=7andx3+1x3=18now(x2+1x2)(x3+1x3)=7×18x5+1x5+x+1x=126x5+1x5=123
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