Toán Lớp 6: Chứng minh rằng S chia hết cho 2;5
S=2+2^2+2^3+2^4+…+2^99+2^100
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: Chứng minh rằng S chia hết cho 2;5
S=2+2^2+2^3+2^4+…+2^99+2^100
Comments ( 2 )
S=1.2+2.2+2. 2^2+2. 2^3+…+2. 2^98+2. 2^99
S=2(1+2+2^2+2^3+…+2^98+2^99)\vdots2
———————————————–
S=(2+2^3)+(2^2+2^4)+…+(2^97+2^99)+(2^98+2^100)
S=2(1+4)+2^2(1+4)+…+2^97(1+4)+2^98(1+4)
S=2.5+2^2. 5+…+2^97. 5+2^98. 5
S=5(2+2^2+…+2^97+2^98)\vdots5