What is the sum of a 58th arithmetic sequence where the first term is 6 and the last term is 405

Formula to find the sum of nth terms of an arithmetic sequence is:

Where, = sum of nth terms.

= first term.

= last term.

Now we need to find, sum of a 58th arithmetic sequence where the first term is 6 and the last term is 405 .

So, plug in n = 58, = 6 and = 405 in the above formula.

=

=

= 11919

So, the sum of 58th terms is 11919.

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step-by-step explanation: