Help with this question asap!!

1st option.

Step-by-step explanation:

The given sequence is as follows:

Here, we can see that the denominator is in AP and the sequence is:

1, 3, 7, 9, 11

first term, a  = 1

Common difference, d = 2

We know that nth term for an AP:

where a is the first term and

d is the common difference.

So, nth term for above AP:

Here, we have 'k' in place of 'n':

And as per the given sequence in the question, the kth term is simply the reciprocal:

i.e.

and sum is to be done up to k = 6 from k = 1.

Hence, the summation notation for the sequence

is:

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step-by-step explanation:

practice. practice. practice.