[tex]a) \\ \\ 9 \times {3}^{x} \times 81 = {3}^{10} \\ {3}^{2} \times {3}^{x} \times {3}^{4} = {3}^{10} \\ {3}^{6} \times {3}^{x} = {3}^{10} | \div {3}^{6} \\ {3}^{x} = {3}^{10 - 6} \\ {3}^{x} = {3}^{4} [/tex]
Należy wpisać 4
[tex]b) \\ \\ {2}^{x} \times 16 = {2}^{7} \\ {2}^{x} \times {2}^{4} = {2}^{7} | \div {2}^{4} \\ {2}^{x} = {2}^{7 - 4} \\ {2}^{x} = {2}^{3} [/tex]
Należy wpisać 3
