Question

tìm x

(2⁴:8+5.3^x+1).2 = 94

giải nhanh giúp mình nha mình cần gấp

Answer 1

\(\left(2^4:8+5.3^{x+1}\right).2=94\)

\(\Rightarrow\left(2+5.3^{x+1}\right)=94:2=47\)

\(\Rightarrow5.3^{x+1}=47-2=45\)

\(\Rightarrow3^{x+1}=9=3^2\Rightarrow x=2-1=1\)

Answer 2

(2⁴:8 + 5.3^x+1) . 2 = 94

 2 + 5.3^x.3 = 47

15.3^x = 45

3^x = 3 = 3¹

=> x = 1

Answer 3

\(\left(2^4:8+5.3^{x+1}\right).2=94\)

\(\Leftrightarrow2^4:8+5.3^{x+1}=47\)

\(\Leftrightarrow2+5.3^{x+1}=47\)

\(\Leftrightarrow2+15.3^x=47\)

\(\Leftrightarrow15.3^x=45\)

\(\Leftrightarrow3^x=3\Leftrightarrow x=1\)