Toán Lớp 6: 18576 : { 105^0 + [2. (102 +101 – 99+98 + 97 – 96 -95+ …+6 +5 – 4 -3 +2 +1) -201 ] } ^3
Leave a reply
Register Now
Login
Lost Password
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Toán Lớp 6: 18576 : { 105^0 + [2. (102 +101 – 99+98 + 97 – 96 -95+ …+6 +5 – 4 -3 +2 +1) -201 ] } ^3
Comments ( 1 )
Đặt A = 102 + 101 – 100 – 99 + 98 + 97 – 96 – 95 + …………… + 6 + 5 – 4 – 3 + 2 + 1
A = (102 + 101 – 100 – 99) + (98 + 97 – 96 – 95) + …….. + (6 + 5 – 4 – 3) + 2 + 1
A=4+4+………..+4+3A=4.25+3A=103⇒18576:{105^0[2(102+101−100−99+98+97−96−95+………+6+5−4−3+2+1)−201]}^3
=18576:[1+(2.103)−201]^3
=18576:6^3
=18576:216
=86