1.

If x+1/3=3 then find x^3+1/ x^3​

Answer»

Answer:

Step-by-step explanation:

It is GIVEN that

x+1x=3

Taking CUBES on both sides,

(x+1x)3=33

Since,

(a+b)3=a3+3a2b+3ab2+b3

Therefore,

x3+3x2x+3xx2+1x3=27

x3+3x+3x+1x3=27

x3+1x3+3(x+1x)=27

x3+1x3+3(3)=27

x3+1x3+9=27

x3+1x3=27−9

x3+1x3=18

Hope that HELPS!



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