# Find S10 if a = 6 and d = 3 - Algebra

Sum

Find S10 if a = 6 and d = 3

#### Solution

a = 6 and d = 3     ......[Given]

Since Sn = "n"/2[2"a" + ("n" - 1)"d"],

S10 = 10/2[2(6) + (10 - 1)(3)]

= 5[12 + 9(3)]

= 5(12 + 27)

= 5(39)

= 195

Concept: Sum of First n Terms of an AP
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