Question

if fx = 2x +1/x
a is the rrot find @​

Answer 1

Step-by-step explanation:

Since 'a' is the root of (x² - 3x + 2 = 0), 'a' :

:

$\alpha = \frac{3 + \sqrt{9 - 8} }{2}$

$\alpha = \frac{3 - \sqrt{9 - 8} }{2}$

:

$\alpha = 1 \: and \: 2$

now f(alpha) = 2(1) +(1/1), 2(2) + (1/2)

= (2 + 1) , (4+(1/2)

= 3,(9/2)

Since, (9/2) is not there in the option, 3 is the correct option.

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