Subtract 2 2 from 3 3. Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor.

3, 5, 7, 9,.. Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals. For math, science, nutrition, history, geography, engineering, mathematics, linguistics, sports, finance, music…

2018年4月30日 · a_n=3+2(n-1) Find the common difference d: d=5-3= 2 Write the rule: a_n=a_1+d(n-1) a_n=3+2(n-1)

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2024年2月8日 · 1＋9＝10，3＋7＝10， 所以，按照这个规律，5 后面的括号里应该填 5. 那么，按照小学生的数学题，以小学生的数学水平和理解能力来说，就只有这两个解答和这两个答案了，括号里可以填 5 或 7.

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偶数位的数是3,7,13，相互之间的差值为7-3=4,13-7=6，所以下一个偶数位的数是13+8=21. 相隔的数字之间有规律：3,7,13相差4,6，下一个应该差8，即21。 3,5,9,15各自相差2,4,6，下一个应该差8，即23。 所以依次填21和23. 递增规律 0,2, 2,2, 4,2 6,2…… 原数列的奇数位 3 5 9 15后一个23; 原数列的偶数位 3 7 13 _， 质数表2 (3)5 (7)11 (13)17 (19)23 (29)， 原数列与质数表的偶数位相等不是一种规律吗？ (为什么规律非得是奇偶位递增差，我思维就这么跳，这题有bug) 这道题你 …

Answer: The sum of the arithmetic sequence is 120. Let's observe the pattern and get the sum of the arithmetic sequence. Given arithmetic sequence: 3, 5, 7, 9, ..., 21. The first term of the sequence is a = 3 and a common difference is d = 5 − 3 = 2.

2021年6月30日 · The mean of the numbers 3, 5, 7, and 9 is 6. Explanation: To find the mean of a set of numbers, you need to sum all the values and then divide the sum by the total number of values. In this case, the numbers are 3, 5, 7, and 9. Adding these …