Question

If x + 1/x = 5, find the value of x3 + 1/x3 .​

Answer 1

Answer:

put x = 5

=5 + 1/ 5

=5 × 3 + 1/5 × 3

=15/1 + 1/15

= 1/1

= 1

Answer 2

Step-by-step explanation:

x+x1=5

→cubing,(x+x1)3=125

→x3+x31+3(x+x1)=125

→x3+x31=125−15=110