Question

1
X+-= 2 cose
If X
is equal to
x++
+
then​

Answer 1

plz check out the questions

you understand that this

Answer 2

Answer = x²+ 1/x² = 11

= x-1 /x = 3.....(1)

= (x - 1 /x² ) 3²

= x² + 1/x²-2 * x * (1/x ) = 9

/* by algebraic identify:

= (a-b) ² = a²+ b²-2ab*/

= x² + 1/x² -2 = 9

= x² + 1/x² = 9+2

= x² +1/x² = 11