Toán 6 Tính A, B,C ???

N

naruto2001

A) Ta có: Tử = $11.3^22.3^7-9^15$ = $11.3^29 - (3^2)15$ = $11.3^29-3^30 = 3^29(11-3)$ = $3^29.8$ = $3^29.2^3$
Mẫu = $(2.3^14)^2$ = $2^2 . (3^14)^2$ = $2^2. 3^28$
\Rightarrow $\frac{$3^29.2^3$}{$2^3.3^28$}$=3.2= 6
 
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