12. If ' a' and 'b'are zeros of the polynomial p(x)=3x²-x-4, then find the value of 1/a+1/b.
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Step-by-step explanation:
3x²-x-4
3x²-4x+3x-4
x(3x-4)+1(3x-4)
(x+1)(3x-4)
x+1=0
x=-1
3x-4=0
x=4/3
1/a+1/b
-1/1+3/4
-1+3/4
-4/4+3/4
-1/4
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