化简 10(log_{10}(2)+7)

解答

化简

10 (lo g_{10} (2) + 7)

10 lo g_{10} (2) + 70

十进制

73.01029 \dots

求解步骤

10 (lo g_{10} (2) + 7)

使用分配律:

a (b + c) = ab + a c

10 (lo g_{10} (2) + 7) = 10 lo g_{10} (2) + 10 \cdot 7

= 10 lo g_{10} (2) + 10 \cdot 7

数字相乘:

10 \cdot 7 = 70

= 10 lo g_{10} (2) + 70

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