Mathematics
Senior High
Solved
等差数列の和【奇数の和】
27と28の(2)のやり方を教えてください
27 次の和を求めよ。
□ (1) 1+2+3+ ...... +30
1/12.30(30+1)=465
☐ (2) 1+3+5+......+99
28 次の和を求めよ。
□ (1) 1+2+3+…………+59
1/2:59(+1)=1770
□ (2) 1+3+5+ ・・・・・・ +75
Answers
Were you able to resolve your confusion?
Users viewing this question
are also looking at these questions 😉

