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Given m = 7-43⇒1m=17-43=7+437+437-43=7+4372-432=7+4349-48=7+43m+1m=7-43+7+43=14 ∴ m+1m=14Now, m+1m⇒m+1m2=m2+2×m×1m+1m2=m+2+1m=m+1m+2=14+2=16∴m+1m=16=4
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