If x = 1/(1 + √2), then the value of x2 + 2x + 3 is :
यदि x = 1/(1 + √2) हो, तो x2 + 2x + 3 का मान है :
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Correct answer: C. 4
Explanation
x = 1/(1 + √2) = √2 − 1, so x + 1 = √2 and x² + 2x + 3 = (x + 1)² + 2 = 2 + 2 = 4.
x = √2 − 1, x + 1 = √2; x² + 2x + 3 = (x + 1)² + 2 = 4।
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