Toán Lớp 6: Thu gọn biểu thức:1+2^3+2^6+…+2^300
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Toán Lớp 6: Thu gọn biểu thức:1+2^3+2^6+…+2^300
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=>2^3.S=2^3+2^6+…+2^303
=>8S-S=(2^3+2^6+…+2^303)-(1+2^3+2^6+…+2^300)
=>7S=2^303-1
=>S=[2^303-1]/7
Vậy S=[2^303-1]/7