Questions asked by yumean1119

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• Calculating areas bounded by polar curves looks extremely difficult. Do Americans really need to integrate such a complex expressions without a calculator?
  
• Is it OK to ask a question and answer it by myself in order to be linked from other questions? Isn't it considered to be an abuse?
  
• What is the recurrence formula for #K_n#? #K_n# is the number of strings (#a_1,a_2,...,a_n) with words from set {0, 1, 2} under the following conditions.
  
• What is the recurrence formula for #L_n#? #L_n# is the number of strings (#a_1,a_2,...,a_n#) with words from set {#0, 1, 2#} without any adjacent #0# and #2#.
  
• What is the difference between VAR.S function and VAR.P function on Microsoft Excel?
  
• A Happy New Year! Why don't you solve these questions related to 2018?