Question

if a+b+c=0 then find a4+b4+c4

Answer 1

a4+b4+c4
=4(a+b+c) 4 is common
=4(0) value of a+b+c
=0
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Answer 2

(a+b+c)=0
Squaring and equating and again squaring and again equating we get
a^4+b^4+c^4=2(a^2b^2+b^2c^2+c^2a^2)