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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: Tổng lũy thừa: A= 1^2 +3^2 + 5^2 +…+ 2021^2 B= 2^2 +4^2 + 6^2 +-+ 2020^2

Home/ Toán Lớp 6: Tổng lũy thừa: A= 1^2 +3^2 + 5^2 +…+ 2021^2 B= 2^2 +4^2 + 6^2 +-+ 2020^2

Toán Lớp 6: Tổng lũy thừa: A= 1^2 +3^2 + 5^2 +…+ 2021^2 B= 2^2 +4^2 + 6^2 +-+ 2020^2

Tháng Sáu 28, 2022 Toán học 1 Comment 0 views

Toán Lớp 6: Tổng lũy thừa:
A= 1^2 +3^2 + 5^2 +…+ 2021^2
B= 2^2 +4^2 + 6^2 +….+ 2020^2

Comments ( 1 )

  1. phuongthuydung
    phuongthuydung
    28 Tháng Sáu, 2022 at 6:07 sáng
    Reply
    A=1^2+3^2+5^2+…+2021^2
    =1.1+3.3+5.5+…+2021.2021
    =1+9+25+…+4084441
    =10+25+…+4084441
    =35+…+4084441
    =4084476
    B=2^2+4^2+6^2+…+2020^2
    =2.2+4.4+6.6+…+2020.2020
    =4+16+36+…+4080400
    =20+36+…+4080400
    =56+…+4080400
    =4080456
     

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222-9+11+12:2*14+14 = ? ( )

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