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Consider the following pattern. \(2^2 + 1 = 5\), \(3^2 + 1 = 10\), \(4^2 + 1 = 17\), \(5^2 + 1 = 26\) Using the given pattern find the value of \(x\) in \(x^2 + 1 = 170\).

Question and options

Consider the following pattern.
22+1=52^2 + 1 = 5, 32+1=103^2 + 1 = 10, 42+1=174^2 + 1 = 17, 52+1=265^2 + 1 = 26
Using the given pattern find the value of xx in x2+1=170x^2 + 1 = 170.
  1. 12
  2. 15
  3. 14
  4. 13

Answer and explanation

Correct answer: D - 13
The pattern is n2+1n^2 + 1: 22+1=52^2+1=5, 32+1=103^2+1=10, 42+1=174^2+1=17, 52+1=265^2+1=26. x2+1=170x^2 + 1 = 170 gives x2=169x^2 = 169, so x=13x = 13.

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