Question
If 10 9 38 x 5428 Then, 2x² + 1 =
? In each of the following questions a number series is given. One term of the series is denoted by X. You have to calculate the value of X and by using the value of X , you have to replace the question mark (?) in the following questions :Solution
10 × 1² - 1 = 9 9 × 2² + 2 = 38 38 × 3² - 3 = 339 339 × 4² + 4 = 5428 Hence, x = 339 Hence, 2(339)² + 1 = (2 × 13221) + 1 = 26443
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