© examsiri.com
Question : 10 of 160
Marks:
+1,
-0
Solution:
It is given that, if
x2+x+1=0, then
As, we know that
w and
w2 are roots of quadratic equation
x2+x+1=0, so
w3=1 and
1+w+w2=0 ∴‌‌A3=(−1)(−1)(8)=8 Similarly,
A6=82,A9=83,... and so on
∴‌‌‌+‌+‌+‌+...∞
© examsiri.com
Go to Question: