Cho $\log a=10, \log b=100$. Khi đó $\log \left(a b^{3}\right)$ bằng

A. 310 . B. -290 . C. 30 . D. 290 . Ta có $\log \left(a b^{3}\right)=\log a+\log b^{3}=\log a+3 \log b=10+3.100=310$.

Question

Accepted Answer

A.

310 .

B.

-290 .

C.

30 .

D.

290 .

Ta có $\log \left(a b^{3}\right)=\log a+\log b^{3}=\log a+3 \log b=10+3.100=310$.