Question

tìm x biết:

2^x+5+2^x+2=48

( mink sẽ tick cho bạn trả lời nhanh nhất)

Answer 1

\(2^{x+5}+2^{x+2}=48\)

\(\Leftrightarrow2^{x+2}\left(2^3+1\right)=48\)

\(\Leftrightarrow9\cdot2^{x+2}=48\)

\(\Leftrightarrow2^{x+2}=\frac{16}{3}\)

Đề có sai ko hả bạn

Answer 2

2^x+5+2^x+2=48

2^2x+7=48

x=5 nếu +9

Answer 3

\(2^{x+5}+2^{x+2}=48\)

\(\Rightarrow2^x.32+2^x.4=48\)

\(\Rightarrow2^x\left(32+4\right)=48\)

\(\Rightarrow2^x.36=48\Rightarrow2^x=48:36=\frac{4}{3}\)

\(.......................................\)

Answer 4

\(2^{x+5}+2^{x+2}=48\)

\(\Rightarrow2^x+2^5+2^x+2^2=48\)

\(\Rightarrow2^x.\left(2^5+2^2\right)=48\)

\(\Rightarrow2^x.36=48\)

\(\Rightarrow2^x=\frac{4}{3}\)

\(\Rightarrow x=\varnothing\)