Question

7. It a and b are the zeros of the given quadratic polynomial f(x)= 5x²-7x +1, find the value 1/a + 1/b

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Answer 1

sum of zeros = a+b = 7/5

product of zeros = ab= 1/5

1/a +1/b = (a+b)/ab

= (7/5) /(1/5)

= 7