Question

pls solve this question

Answer 1

Answer:

52

Step-by-step explanation:

$x+1/x=4\\=> (x+1/x)^3= 4^3= 64 (cubing both sides)\\=>x^3+1/x^3 +3(x)(1/x)(x+1/x) = 64 [use (a+b)^3=a^3+b^3+3ab(a+b)]\\=>x^3+1/x^3+3(4)=64\\=>x^3+1/x^3= 64- 3*4\\= 52$