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If a = 6 and d = 10, then find S10 - Algebra

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Sum

If a = 6 and d = 10, then find S10 

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Solution

a = 6 and d = 10    ......[Given]

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

S10 = `10/2 [2(6) + (10 - 1)(10)]`

= 5[12 + 9 (10)]

= 5(12 + 90)

= 5(102)

= 510

Concept: Sum of First n Terms of an AP
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