Solve all questions with full process. Please it's urgent , tomorrow is my exam.
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nitthesh7:
Hey did u see my ans for the ques a man earned ..........spent 650.......
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Answered by
2
8)
x+1/x=4
Squaring on both sides
(x+1/x)^2=4^2
x^2+2*x*1/x+(1/x)^2=16
x^2+2+1/x^2=16
x^2+1/x^2=16-2
x^2+1/x^2=14
9)
x-1/x=5
Squaring on both sides
(x-1/x)^2 =5^2
x^2 - 2*x*1/x+1/x^2 =25
x^2+1/x^2 =25+2
x^2+1/x^2 =27
Again Squaring on both sides
(x^2)^2 +(1/x^2) ^2=27^2
x^4+2*x^2 *1/x^2 +1/x^4=729
x^4+1/x^4=729-2
x^4+1/x^4=727
x+1/x=4
Squaring on both sides
(x+1/x)^2=4^2
x^2+2*x*1/x+(1/x)^2=16
x^2+2+1/x^2=16
x^2+1/x^2=16-2
x^2+1/x^2=14
9)
x-1/x=5
Squaring on both sides
(x-1/x)^2 =5^2
x^2 - 2*x*1/x+1/x^2 =25
x^2+1/x^2 =25+2
x^2+1/x^2 =27
Again Squaring on both sides
(x^2)^2 +(1/x^2) ^2=27^2
x^4+2*x^2 *1/x^2 +1/x^4=729
x^4+1/x^4=729-2
x^4+1/x^4=727
What does ^ mean?
and why did u write +2
^mean power ex 2^2 ... 2 power of 2
+2 is bcoz she cancelled 2*1/x*x
^ to the power of
Answered by
1
8)
x+1/x = 4
(x+1/x)² = 4 ²
x² +1/x²+2 =16
x²+1/x² = 16-2
= 14
x+1/x = 4
(x+1/x)² = 4 ²
x² +1/x²+2 =16
x²+1/x² = 16-2
= 14
why +2
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