9. If a=6 and d=10, then find S 10.
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Answered by
0
Answer:
s10 = 195
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Answered by
0
Answer:
510
Step-by-step explanation:
Sn = n/2 [ 2a + (n-1) d]
S10 = 10/2 [ 2× 6 + (10-1) 10]
= 5 × [12 + 90 ]
= 5 × 102
= 510
Therefore, S10 = 510....
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