6. Find the sum of first 15 multiplies of 8.

1.	6. Find the sum of first 15 multiplies of 8.
Answer» Answer: Sum of FIRST 15 MULTIPLES of 8 is 960 Step-by-step explanation: First Term (a) = 8 Common Difference (d) = 8 Number of TERMS (n) = 15 So, Sn = n/2 [2a + (n-1)d ] Sn = 15/2 [2(8) + 14(8)] Sn = 15/2 [16 + 112] Sn = 15/2 [128]. Sn = 15 [64] Sn = 960..... So, Sum of first 15 multiples of 8 is 960

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Answer:

Sum of FIRST 15 MULTIPLES of 8 is 960

Step-by-step explanation:

First Term (a) = 8

Common Difference (d) = 8

Number of TERMS (n) = 15

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

Sn = 15/2 [2(8) + 14(8)]

Sn = 15/2 [16 + 112]

Sn = 15/2 [128].

Sn = 15 [64]

Sn = 960.....

So, Sum of first 15 multiples of 8 is 960

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6. Find the sum of first 15 multiplies of 8.​

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6. Find the sum of first 15 multiplies of 8.