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DENIUS [597]
3 years ago
10

Use an arithmetic sequence to find the number of multiples of 6 between 41 and 523. Justify your reasoning.

Mathematics
2 answers:
Aleks04 [339]3 years ago
5 0

Answer:

81

Step-by-step explanation:

The numbers divisible by 6 between  41 and 523 are:

42,48,54,.....,522

We can clearly see that the first term that  is a=42,

Common difference that is d=6

And a_n=522

We will use the formula

a_n=a+(n-1)d

On substituting the values we get

522=42+(n-1)6

\Rightarrow 522=42+6n-6

\Rightarrow 522=36+6n

\Rightarrow 486=6n

\Rightarrow 81=n

Hence, there are 81 multiples of 6 between 41 and 523.

sesenic [268]3 years ago
3 0

Answer:

The number of multiples of 6 between 41 and 523 = 81

Step-by-step explanation:

We need to find multiples of 6 between 41 and 523.

First multiple is 42.

That is first term is 42.

Common difference is 6.

The last term less than 523 and multiple of 6 is 522.

So we need to find number of terms in

               42, 48, 54 , 60 , 66 .............................522

           We have

                       a + (n-1) d = 522

                      42 + (n-1) 6 = 522

                       (n-1) 6 = 522 - 42 = 480

                          (n-1) = 80

                            n = 81

That is there are 81 terms in this arithmetic progression.

The number of multiples of 6 between 41 and 523 = 81

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