if alpha,beta,gama are the zeroes of x²+5x²-3x-4 then find 1/alpha+1/beta+1/gama
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x³+5x²-3x-4
a,b,c are roots
a+b+c=-5
ab+bc+ca=-3
abc=4
1/a+1/b+1/c=ab+bc+ca/abc
=-3/4
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