if a = 1 + root 2 find the value of a minus 1 /a the whole raised to 3
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Answer:
5√2-7
Step-by-step explanation:
a = 1 + √2
1/a = 1/(1+√2) = √2-1
cube the expression
( √2 - 1 )³ = 2√2 - 1 - 6 + 3√2 = 5√2 - 7
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