if x2+1/X2 =7 then find x+1/x
Answers
Given Equation is x^2 + 1/x^2 = 7
Given Equation is x^2 + 1/x^2 = 7We know that (x + 1/x)^2 = x^2 + 1/x^2 + 2 * x * 1/x
Given Equation is x^2 + 1/x^2 = 7We know that (x + 1/x)^2 = x^2 + 1/x^2 + 2 * x * 1/x = x^2 + 1/x^2 + 2
Given Equation is x^2 + 1/x^2 = 7We know that (x + 1/x)^2 = x^2 + 1/x^2 + 2 * x * 1/x = x^2 + 1/x^2 + 2 = 7 + 2
Given Equation is x^2 + 1/x^2 = 7We know that (x + 1/x)^2 = x^2 + 1/x^2 + 2 * x * 1/x = x^2 + 1/x^2 + 2 = 7 + 2 = 9
Given Equation is x^2 + 1/x^2 = 7We know that (x + 1/x)^2 = x^2 + 1/x^2 + 2 * x * 1/x = x^2 + 1/x^2 + 2 = 7 + 2 = 9 (x + 1/x) = 3
Given Equation is x^2 + 1/x^2 = 7We know that (x + 1/x)^2 = x^2 + 1/x^2 + 2 * x * 1/x = x^2 + 1/x^2 + 2 = 7 + 2 = 9 (x + 1/x) = 3Now,
Given Equation is x^2 + 1/x^2 = 7We know that (x + 1/x)^2 = x^2 + 1/x^2 + 2 * x * 1/x = x^2 + 1/x^2 + 2 = 7 + 2 = 9 (x + 1/x) = 3Now,(x^3 + 1/x^3) = (x + 1/x)^3 - 3 * x * 1/x * (x + 1/x)
Given Equation is x^2 + 1/x^2 = 7We know that (x + 1/x)^2 = x^2 + 1/x^2 + 2 * x * 1/x = x^2 + 1/x^2 + 2 = 7 + 2 = 9 (x + 1/x) = 3Now,(x^3 + 1/x^3) = (x + 1/x)^3 - 3 * x * 1/x * (x + 1/x) = (x + 1/x)^3 - 3(x + 1/x)
Given Equation is x^2 + 1/x^2 = 7We know that (x + 1/x)^2 = x^2 + 1/x^2 + 2 * x * 1/x = x^2 + 1/x^2 + 2 = 7 + 2 = 9 (x + 1/x) = 3Now,(x^3 + 1/x^3) = (x + 1/x)^3 - 3 * x * 1/x * (x + 1/x) = (x + 1/x)^3 - 3(x + 1/x)
Given Equation is x^2 + 1/x^2 = 7We know that (x + 1/x)^2 = x^2 + 1/x^2 + 2 * x * 1/x = x^2 + 1/x^2 + 2 = 7 + 2 = 9 (x + 1/x) = 3Now,(x^3 + 1/x^3) = (x + 1/x)^3 - 3 * x * 1/x * (x + 1/x) = (x + 1/x)^3 - 3(x + 1/x) = (3)^3 - 3(3)
Given Equation is x^2 + 1/x^2 = 7We know that (x + 1/x)^2 = x^2 + 1/x^2 + 2 * x * 1/x = x^2 + 1/x^2 + 2 = 7 + 2 = 9 (x + 1/x) = 3Now,(x^3 + 1/x^3) = (x + 1/x)^3 - 3 * x * 1/x * (x + 1/x) = (x + 1/x)^3 - 3(x + 1/x) = (3)^3 - 3(3) = 27 - 9
Given Equation is x^2 + 1/x^2 = 7We know that (x + 1/x)^2 = x^2 + 1/x^2 + 2 * x * 1/x = x^2 + 1/x^2 + 2 = 7 + 2 = 9 (x + 1/x) = 3Now,(x^3 + 1/x^3) = (x + 1/x)^3 - 3 * x * 1/x * (x + 1/x) = (x + 1/x)^3 - 3(x + 1/x) = (3)^3 - 3(3) = 27 - 9 = 18.
Answer: 3 or -3
Step-by-step explanation:
Given x^2+1/x^2=7
(x + 1/x)^2 = x^2 + 1/x^2 + 2(x)(1/x)
=7+2
=9
So x + 1/x = 3 or -3