Question 122

If a + 1/a = 1, then the value of a^2 + 1/a^2 is :

Solution

it is given that a + 1/a = 1

and we need to find value of $$a^2 + \frac{1}{a^2}$$

$$a^2 + \frac{1}{a^2}$$ = $$(a + \frac{1}{a})^2$$ - 2

= $$1^2$$ - 2 = -1

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