Question
In each of the following questions the number series is
given. One term of the series is denoted by x. You have to calculate of value of x and by using the value of x, you have to solve the following questions. If  4      10   16     26      x    50 Then find the value of (x² - 1) + (x² + 1).Solution
2 ² = 4 3² + 1 = 10 4² = 16 5² + 1 = 26 6² = 36       7² + 1 = 50 Then, (x² - 1) + (x² + 1) ⇒ (36² - 1) + (36² + 1) ⇒ (1296 – 1) + (1296 + 1) ⇒ 1295 + 1297 = 2592
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