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Q.

Zero of the polynomial $7 x - 2 is \frac{a}{b} (\frac{a}{b} is a simplest form of rational number),$ then $a + b =$

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a

14

b

15

c

6

d

9

answer is D.

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Detailed Solution

$7 x - 2 = 0$

$x = \frac{2}{7} = \frac{a}{b}$

$a + b = 2 + 7 = 9$

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