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MatroZZZ [7]
2 years ago
9

The first term of a sequence is a multiple of 3 The second term of this sequence is 6 less than the first term. The third term i

s 1/5 of the first term. The difference between the first and the third term is 12.
Work out the values of the first three terms of this sequence.​
Mathematics
1 answer:
Mekhanik [1.2K]2 years ago
7 0

Answer:

First term = 15

Second term = 9

Third term =  3

Step-by-step explanation:

Given,

First term = 3x

Second term = 3x - 6

Third term =  \frac{1}{5} (3x) =  \frac{3x}{5}

Also,

3x -  \frac{3x}{5}  = 12

\frac{15x}{5}  -  \frac{3x}{5}  = 12

\frac{15x - 3x}{5}  = 12

15x - 3x = 12 \times 5

12x = 60

x =  \frac{60}{12}

x = 5

With the value of x, we conclude that the first three terms are as follows:

First term = 3x = 3×5 = 15

Second term = 3x - 6 = 15 - 6 = 9

Third term = \frac{3x}{5} =\frac{15}{5}= 3

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