Question

find x3+1/x3 if x2+1/x2=18​

Answer 1

Answer:

No given 3x +1 / 3x

So 2x + 1 /2x =18

By using cross multiplication

U will get 2x × 18 = 2x +1

Transposition method

36x = 2x + 1

36/2 = x + 1

18 = X + 1

X = 18 - 1

X = 17

SO PUT THE VALUE NOW

In this 3x +1 / 3x

U WILL GET 3 × 17 + 1 / 3 × 17

51 +1 / 51 =52/51

I hope this may help u......