M4maths Maths Puzzle Category

if x+1/x=9 what is the value of x^5+1/x^5

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55449 is answer ..
Squaring on both sides and simplify
U get
X2+1/x2 = 79---------------(1)
Cubing
X3 + 1/x3 = 702 ----------(2)
From (1)*(2) u can get answer 55449
7 years agoHelpfull: Yes(1) No(0)

X+1/x=9. =x^5+1/x^5
X+1=9x. =x^6/x^5
8x=1. =x^1
x=1/8;. = 1/8
5 years agoHelpfull: Yes(0) No(0)

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