Question

Hello !!

solve 1st question so easy !! ⛰

Answer 1

Final answer : 0


We know that,
$1 + x + {x}^{2} + {x}^{3} = 0 \\ (1 + x) + {x}^{2} (1 + x) = 0 \\ (1 + {x}^{2} )(1 + x) = 0 \\ (x + 1) = 0 \: \: \\ = > x = - 1 \\ or \: 1 + {x}^{2} = 0 \\ = > not \: possible \: for \: \: x \: belongs \: \\ to \: real$


There are even no. of terms, so all will be paired up.

Now, look at the picture attached to it.