If a-1a=7,then a2+1a2=?
A) 54 B) 51 C) 53 D) 52
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Answer:
option B is the answer for the given problem
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Step-by-step explanation:
square both a2-1/a2=7×7
a2 +1/a2-2a×1/a= 49 (a×1/a cancel)
a2+1/a2-2=49
a2+1a2=49+2
a2+1/a2=51..
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