Answered

Experience the convenience of getting your questions answered at IDNLearn.com. Get the information you need from our community of experts, who provide detailed and trustworthy answers.

find the sum of the first ten terms of an arithmetic series if the first term is 3 and the last term is 39a. 190b.210c.230d.275

Sagot :

Given the first term is 3 and the last term is 39.

Recall that the sum is given as:

[tex]S_n=\frac{n}{2}(a_1+a_n)[/tex]

Substituting in the above equation gives:

[tex]\begin{gathered} S_n=\frac{10}{2}(3+39) \\ S_n=5(42) \\ S_n=210 \end{gathered}[/tex]

Therefore, option (a) is correct.

We value your participation in this forum. Keep exploring, asking questions, and sharing your insights with the community. Together, we can find the best solutions. Your questions are important to us at IDNLearn.com. Thanks for stopping by, and come back for more reliable solutions.