- 170
- 171
- 172
- 174

Option 2 : 171

**Given:**

X - 1/X = 13

**Calculations:**

⇒ X - 1/X = 13

⇒ (X - 1/X)^{2} = 13^{2}

⇒ X^{2} + 1/X^{2} - 2 = 169

⇒ X2 + 1/X2 = 171

**∴ The value of X2 + 1/X2** **is 171.**

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