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Papessa [141]
4 years ago
7

Find the sum of the following ap .1) 1/15, 1/12, 1/10,....,to 11 terms​

Mathematics
1 answer:
sertanlavr [38]4 years ago
8 0

Answer:

33/20

Step-by-step explanation:

1/12 - 1/15 = 5/60 - 4/60 = 1/60

d = 1/60

a_n = a_1 + d(n - 1)

a_11 = 1/15 + (1/60)(11 - 1)

a_11 = 1/15 + 1/6

a_11 = 4/60 + 10/60

a_11 = 14/60

a_11 = 7/30

a_12 = 14/60 + 1/60

a_12 = 15/60

a_12 = 1/4

s_n = n(a_1 + a_n)/2

s_11 = 11(1/15 + 7/30)/2

s_11 = 11(2/30 + 7/30)/2

s_11 = 11(9/30)/2

s_11 = 99/60

s_11 = 33/20

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Step-by-step explanation:

Lets do a pro gamer move and convert all fractions to decimals.

We now have 1+1+1.25+1.5+1.5.

From there on we simply do addition.

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4 years ago
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Answer:

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Step-by-step explanation:

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3 years ago
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Step-by-step explanation:

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Step-by-step explanation:

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An account with $600 earns 4% simple interest per year. The next year all the money is put into a new account that earns 4.5% si
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I believe this is correct and I hope this helps! :)
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