Find the sum arithmetic progression 1/15,1/12,1/10,........up to 11 te

1.	Find the sum arithmetic progression 1/15,1/12,1/10,........up to 11 terms
Answer» 30/20 Step-by-step explanation: The given AP is 1/15, 1/12, 1/10........ 11 terms a = 1/15, d = 1/12 - 1/15 = (5 - 4)/60 = 1/60 We know, sum of n terms Sn = n/2[2a + (n-1)d] Then, sum of 11 terms of given AP S11 = 11/2[21/15 + 101/60] = 11/2[2/15 + 10/60] = 11/2[(8 + 10)/60] = 11/2(18/60) = 33/20 This is *the* *answer* .HOPE it *will* be *USEFUL* *for* *you*

Find the sum arithmetic progression 1/15,1/12,1/10,........up to 11 terms

Answer»

30/20

Step-by-step explanation:

The given AP is 1/15, 1/12, 1/10........ 11 terms

a = 1/15,

d = 1/12 - 1/15 = (5 - 4)/60

= 1/60

We know, sum of n terms

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

Then, sum of 11 terms of given AP

S11 = 11/2[2*1/15 + 10*1/60]

= 11/2[2/15 + 10/60]

= 11/2[(8 + 10)/60]

= 11/2(18/60)

= 33/20

This is the answer .HOPE it will be USEFUL for you

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Find the sum arithmetic progression 1/15,1/12,1/10,........up to 11 terms​

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Find the sum arithmetic progression 1/15,1/12,1/10,........up to 11 terms