Matemática, perguntado por JrBH, 1 ano atrás

simplifique a expressão 12x10^-3×10^-4x10^8 tudo isso sobre 12x10^-1x10^-4

Anexos:

Soluções para a tarefa

Respondido por viniciushenrique406
16
\large\textsf{Principais propriedades exponenciais:}\\\\\\\mathsf{P1.~~a^m\cdot a^n=a^{m+n}}\\\\\\\mathsf{P2.~~\dfrac{a^m}{a^n}=a^{m-n}~~~~(para~a \neq0~e~m \geq n)}\\\\\\\mathsf{P3.~~(a\cdot b)^n=a^n\cdot b^n}\\\\\\\mathsf{P4.~~(\dfrac{a}{b})^n=\dfrac{a^n}{b^n}~~~~(b \neq 0)}\\\\\\\mathsf{P5.~~(a^m)^n=a^{m\cdot n}}\\\\\\\textsf{Expoente racional:}~~\large\fbox{$\mathsf{a^{\frac{b}{c}}=\sqrt[c]{\mathsf{a^b}}}$}\\\\\\\textsf{Expoente inteiro negativo:}~~\fbox{$\mathsf{a^{-n}=\dfrac{1}{a^n}}$}


\large\textsf{Portanto:}


\large\begin{array}{l}\mathsf{\dfrac{12\cdot10^{-3}\cdot10^{-4}\cdot10^8}{12\cdot10^{-1}\cdot10^{-4}}}\\\\\\\mathsf{\dfrac{12\hspace{-10}\diagup\cdot10^{-3}\cdot10^{-4\hspace{-5}\diagup}\hspace{-25}\diagup~~~\cdot10^8}{12\hspace{-10}\diagup\cdot10^{-1}\cdot10^{-4\hspace{-5}\diagup}\hspace{-24}\diagup}}\end{array}


\large\begin{array}{l}=\mathsf{\dfrac{10^{-3}\cdot10^8}{10^{-1}}}\\\\\\=\mathsf{\dfrac{10^{(-3+8)}}{10^{-1}}}\\\\\\=\mathsf{\dfrac{10^5}{10^{-1}} }\\\\\\=\mathsf{10^{5-(-1)}}\\\\\\=\fbox{$\mathsf{10^6~\Leftrightarrow~1.000000}$}\end{array}





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