Question

Solve ..

a = 4 , d = 2 , n = 14 , al = 30

find sum of the first 14 terms ..​

Answer 1

Answer:

a = 4 , n = 14 , al = 30

$sn = \frac{n}{2} (a + al) \\ = \frac{14}{2} (4 + 30) \\ = 7(34) \\ = 238 \\ \\ s14 = 238$

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