If a and b are the roots of 4x^2+3x+7=0 then find the value of 1/a^3+1/b^3 is
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(a)-3/7
(b)3/7
(c)-3/7
(d)3/7
(e)-3/4
(f)3/4
answer is a )-3/7
we known that a+b =3/4and 7/4
so 1 a+ b=(a+b/ab
=(-3/7)
(b)3/7
(c)-3/7
(d)3/7
(e)-3/4
(f)3/4
answer is a )-3/7
we known that a+b =3/4and 7/4
so 1 a+ b=(a+b/ab
=(-3/7)
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