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Sum of N Terms of an AP

Question 3 i ...

Question

Question 3 (i)
In the following APs, find the missing term in the boxes.

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Solution

(i) For this A.P.,
$a = 2 a_{3} = 26 W e k n o w t h a t, a_{n} = a + (n - 1) d a_{3} = 2 + (3 - 1) d 26 = 2 + 2 d 24 = 2 d d = 12 a_{2} = 2 + (2 - 1) 12 = 14$
Therefore, 14 is the missing term.

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Sum of N Terms of an AP

Standard X Mathematics

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