IDNLearn.com connects you with a community of knowledgeable individuals ready to help. Discover in-depth and reliable answers to all your questions from our knowledgeable community members who are always ready to assist.
The 10th and the 20th term of an arithmetic sequence are 10 and 40, respectively. Find its 100th term.
a 10 = 10; a 20 = 40; a n = a 1 + ( n - 1) * r => 10 = a 1 + 9 * r, and, 40 = a 1 + 19 * r => 30 = 10 * r => r = 3 => a 1 = 10 - 27 => a 1 = -17; a 100 = a 1 + 99 * r => a 100 = - 17 + 99 * 3 => a 100 = -17 + 297 => a 100 = 280.
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. Discover insightful answers at IDNLearn.com. We appreciate your visit and look forward to assisting you again.
