What's the expression for the given sequence
1,4, 7, 10, 13.....

3n + 1

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2n + 1

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3n - 1

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Solution

The correct option is A 3n + 1
In the given sequence of numbers,

1st number = $3 \times 0$ + 1 = 1
2nd number = $3 \times 1$ + 1 = 4
3rd number = $3 \times 2$ + 1 = 7
4th number = $3 \times 3$ + 1 = 10
. .
. .
. .
. .
. .
nth number = $3 \times (n)$ + 1
= 3n + 1

$∴$ The expression for the sequence is 3n + 1.

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