Question

if a/b + b/a =2 then a³-b³ =​

Answer 1

b /a  +  a /b=1

$\frac{a^{2} +b^{2}}{ab}$  =1

$a^{2} +b^{2} -ab=0$

now,

$a^{3} +b^{3=(a+b)(a^{2}+b^{2}-ab } \\(a+b)*0=0$

answer=0

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