Algebra | x + 1/x tricks | Important questions with tricky solution for rrb / ntpc/ssc cgl

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Algebra | x + 1/x tricks | Important questions with tricky solution for rrb / ntpc/ssc cgl | algebra questions for competitive exams

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Thank you sir abhi tak ratna padta tha, lekin aaj finally reason bhi mil gaya

ajaykhushwah
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in 2nd question we got x³=1 then cube root of 1 is also 1 so x=1 then if u substitute x=1 in x^512+1/x^512 is will be 1+1/1 =2

Chiduralakrishnavamshi
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Actually question itself wrong. For any real number x+1/x can't be 1

SuryaA-pwul
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In the first question, if x raise to power 3 is -1, then x=-1. Now, if you substitute x with -1 in the original equation, it comes to be x+1/x =-2 and not 1...why like this?

saravpreet
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Sir ye to aur bhi short ho sakta hai.. Bus problem x^3 ki value ko find karne me thi.. Agar x^15 (1st question me) common le le to equation 20 sec me solve ho jayegi

abhisheksrivastav
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Sir it means every time the answer is only 1or -1

gsatao
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X square ki value Anne ke baad kuch smjh nhi ayya

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