Question

Pls give solution of q 17 and 18​

Answer 1

Answer:

x²+1/x²=11

Step-by-step explanation:

ques17. a) x-1/x=3

on squaring both sides

(x-1/x)²=3²

x²+1/x²-2(x)(1/x)=9

x²+1/x²-2=9

b)x-1/x=3

on cubing both sides

(x-1/x)³=3³

x³-1/x³-3x²1/x + 3x1/x²=27

x³-1/x³-3x+3x=27

x³-1/x³=27