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If X= 3+√8, then find the value of x³-1/x³. |
| Answer» ANSWER :36Step-by-step explanation :x - 1 / x = 3On cubing both sides ;( x - 1 / x ) = ( 3 )³Using Identity :( a - B )³ = a³ - b³ - 3 ab ( a - b )⇒ x³ - 1 / x³ - 3 ( x - 1 / x ) = 27⇒ x³ - 1 / x³ - 3 ( 3 ) = 27⇒ x³ - 1 / x³ - 9 = 27⇒ x³ - 1 / x³ = 27 + 9⇒ x³ - 1 / x³ = 36Hence, the answer is 36...please mark as brainlist... | |