1.

X²+1/x²=7 find the value of x+1/x

Answer»

Answer:

3

Step-by-step explanation:

if we ADD +2 on both sides of the equation, we get identity

(<klux>X</klux>+1/x)^{2} = x^{2} + 1/x^{2} + 2 as in,

(x+1/x)^{2} = 9 so, x + 1/x = \sqrt{9} = 3

answer: x + 1/x = 3

i hope this answer helped you and don't forget i MIGHT be wrong.


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