Question

tính giá trị biểu thức: B=7.6¹⁰.2²⁰.3⁶ - 2¹⁹.6¹⁵/9.6¹⁹.2⁹ - 4.3¹⁷.2²⁶

Answer 1

\(=\frac{7.6^{11}.2^{19}.3^5-2^{19}.6^{15}}{3^{21}.2^{28}-3^{17}.2^{28}}=\frac{2^{19}.6^{11}.\left(7.3^5-6^4\right)}{3^{17}.2^{28}.\left(3^4-1\right)}=\frac{2^{30}.3^{11}.3^4.\left(7.3-2^4\right)}{3^{17}.2^{28}.\left(3^4-1\right)}=\frac{2^2.13}{3^2.80}=\frac{13}{9.20}=\frac{13}{180}\)

Answer 2

phải ra là 1/36 bạn làm nhầm bước 2^2.5/3^2.80=1/36