If one zero of 5x^2+13x+k is the reciprocal of the other. Find the value of k
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f (x)=5x^2+13x+k
f (1)=5×1^2+13×1+k
=18+k
=k=-18.
k=-18, x=1.
5×1^2+13×1+(-18)=18-18 =0
f (1)=5×1^2+13×1+k
=18+k
=k=-18.
k=-18, x=1.
5×1^2+13×1+(-18)=18-18 =0
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