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Binoy Majumder

· started a discussion

· 1 Months ago

The explanation for "If x+1/x=-1 then x3=1" is not appropriate (Question: 246545.0 )

It should be:-
x+ 1/x =-1
=>x2 + x + 1 = 0
=> (x-1)(x2 +x +1) = 0
=> x3 -1 = 0
=> x3 = 1

Question:
If a2 + a + 1 = 0 then, find the value of a5 + a4 + 1.
Options:
A) 3
B) 5
C) 0
D) 2
Solution:

Ans: (c)


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