Question

if x+1/3=3 then find x^3+1/ x^3​

Answer 1

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!

Answer 2

Answer:

x

$x = 3 - 1 \div 3 \\ x = 8 \div 3 \\ x {}^{3} + 1 = (({8 \div 3})^{3} + 1) \div ( {8 \div 3})^{3}$