log₁₀ met rekenmachien

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Bepaal x met ZRM

1. \(\log x = 0{,}2\)
2. \(\log x = 0{,}21\)
3. \(\log x = -3{,}1\)
4. \(\log x = 0{,}25\)
5. \(\log x = -0{,}11\)
6. \(\log x = 0{,}16\)
7. \(\log x = -0{,}3\)
8. \(\log x = -3{,}4\)
9. \(\log x = 2{,}5\)
10. \(\log x = 0{,}4\)
11. \(\log x = 0{,}31\)
12. \(\log x = -1{,}8\)

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Bepaal x met ZRM

Verbetersleutel

1. \(\log x = 0{,}2\\ \Leftrightarrow x = 10^{0{,}2} \\ \Leftrightarrow x \approx 1{,}5848931924611\)
2. \(\log x = 0{,}21\\ \Leftrightarrow x = 10^{0{,}21} \\ \Leftrightarrow x \approx 1{,}6218100973589\)
3. \(\log x = -3{,}1\\ \Leftrightarrow x = 10^{-3{,}1} \\ \Leftrightarrow x \approx 0{,}00079432823472428\)
4. \(\log x = 0{,}25\\ \Leftrightarrow x = 10^{0{,}25} \\ \Leftrightarrow x \approx 1{,}7782794100389\)
5. \(\log x = -0{,}11\\ \Leftrightarrow x = 10^{-0{,}11} \\ \Leftrightarrow x \approx 0{,}77624711662869\)
6. \(\log x = 0{,}16\\ \Leftrightarrow x = 10^{0{,}16} \\ \Leftrightarrow x \approx 1{,}4454397707459\)
7. \(\log x = -0{,}3\\ \Leftrightarrow x = 10^{-0{,}3} \\ \Leftrightarrow x \approx 0{,}50118723362727\)
8. \(\log x = -3{,}4\\ \Leftrightarrow x = 10^{-3{,}4} \\ \Leftrightarrow x \approx 0{,}0003981071705535\)
9. \(\log x = 2{,}5\\ \Leftrightarrow x = 10^{2{,}5} \\ \Leftrightarrow x \approx 316{,}22776601684\)
10. \(\log x = 0{,}4\\ \Leftrightarrow x = 10^{0{,}4} \\ \Leftrightarrow x \approx 2{,}5118864315096\)
11. \(\log x = 0{,}31\\ \Leftrightarrow x = 10^{0{,}31} \\ \Leftrightarrow x \approx 2{,}0417379446695\)
12. \(\log x = -1{,}8\\ \Leftrightarrow x = 10^{-1{,}8} \\ \Leftrightarrow x \approx 0{,}015848931924611\)