if X + 1 by x is equal to 6 find the value of x cube minus one by x cube
Answers
Answered by
3
Answer:
-15,624/125
Step-by-step explanation:
(x+1)/x=6
=>x+1=6x
=>6x=x+1
=>6x-x=1
=>5x=1
=>x=1/5
x³-(1/x³)
(1/5)³-1/(1/5)³
1/125-1/(1/125)
1/125-125
={1-(125×125)}/125
=(1-15,625)/125
=-15,624/125
Answered by
5
Step-by-step explanation:
x+1/x = 6
x+1 = 6x
5x = 1
x = 1/5
1/x=5
finding x^3
x^3=( 1/5)^3
x^3 =1/125
finding (1/x)^3
(1/x)^3=5^3
= 125
now subtract 1/125 and 125
1/125-125= -124.992
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