vagoyal6 vagoyal6
  • 15-06-2020
  • Mathematics
contestada

If x=1+√2, evaluate x³+1/x³.

Respuesta :

alainacole619 alainacole619
  • 15-06-2020

Answer:

18

Step-by-step explanation:

So we start solving like:

x+1x=3

(x+1x)3=33

x3+3.x2.1x+3.x.1x2+1x3=27

(x3+1x3)+3.x2.1x+3.x.1x2=27

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

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

x3+1x3+3×3=27

x3+1x3+9=27

x3+1x3=18  

Therefore the answer is 18

Answer Link

Otras preguntas

1 . A farmer moves along the boundary of his rectangular field of side 10m x 20m . farmer covers 1m in 1sec . what will be the magnitude of displacement at the
ecrives 5 lignes sur les forets de france
Divide.(10a^4-5a^3) / 5a
What value was there in predicting the properties for gaps in Mendeleev's table?
Calculate the de Broglie wavelength of an electron traveling at 3.0 × 107 m/s (me = 9.1 × 10-31 kg).
A body of mass 2 kg is moving in the positive X-Direction with a speed of 4 m/s collides head on with an another body of mass 3 kg moving in the negative X-Dire
where did the idea for it come from, what did sputnik do and can you think of anything else about sputnik,
what does 'chop and change' mean?
what does it mean to 'go nuts'?
Calculate the de Broglie wavelength of an electron traveling at 3.0 × 107 m/s (me = 9.1 × 10-31 kg).