3 tháng 10 2022 lúc 22:54
\(a,\left(x-1,5\right)^2=9\)
\(\left(x-1,5\right)^2=3^2\)
\(x=3+1,5\)
\(x=4,5\)
\(b,\left(x-2\right)^3=64\)
\(\left(x-2\right)^3=4^3\)
\(x=4+2\)
\(x=6\)
\(c,2^{4-x}=32\)
\(2^{4-x}=2^5\)
\(x=4-5\)
\(x=-1\)
\(d,\left(x+1,5\right)^2+\left(y-2,5\right)^{10}=0\)
\(\Rightarrow x=-1,5\)
\(y=2,5\)
vì \(\left(x+1,5\right)^2+\left(y-2,5\right)^{10}=0\)
\(\Rightarrow\left(x+1,5\right)^2\) và \(\left(y-2,5\right)^{10}\) phải = 0
\(\Rightarrow x=-1,5\)
\(y=2,5\)
\(e,2^2.2^x+5.2^x=9.2^6\)
\(2^x.\left(2^2+5\right)=9.2^6\)
\(2^x.9=9.2^6\)
\(\Rightarrow x=6\)
\(f,3^2.3^4.3^x=3^7\)
\(3^{2+4}.3^x=3^7\)
\(3^6.3^x=3^7\)
\(x=7-6\)
\(x=1\)
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