..............helppp

Đáp án:

Bạn tham khảo nhé!

Giải thích các bước giải:

$a)\,3y.3y.3y=3y^3\\b)\,x.x^{\large2}.x^{\large3}.\!.\!.x^{\large100}\\=x^{\large1+2+3\ +...+\ 100}\\=x^{\large\frac{(100+1).100}{2}}\\=x^{5050}\\c)\,(a^2)^3.a^6.a^5\\=a^6.a^6.a^5\\=a^{6+6+5}\\=a^{17}\\d)\,64^4.16^5:4^{20}\\=\left(2^6\right)^4.\left(2^4\right)^5:\left(2^2\right)^{20}\\=2^{24}.2^{20}:2^{40}\\=2^{44}:2^{40}=2^4$