计算 lg25 + 2/3 lg8+lg5乘 lg20+(lg2)^2+lg100___.
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![计算 lg25 + 2/3 lg8+lg5乘 lg20+(lg2)^2+lg100___.](/uploads/image/z/4081107-3-7.jpg?t=%E8%AE%A1%E7%AE%97+lg25+%2B+2%2F3+lg8%2Blg5%E4%B9%98+lg20%2B%28lg2%29%5E2%2Blg100___.)
计算 lg25 + 2/3 lg8+lg5乘 lg20+(lg2)^2+lg100___.
计算 lg25 + 2/3 lg8+lg5乘 lg20+(lg2)^2+lg100___.
计算 lg25 + 2/3 lg8+lg5乘 lg20+(lg2)^2+lg100___.
原式=2lg5+2lg2+lg5×(lg2+1)+lg2×lg2+2
=2(lg2+lg5)+lg2(lg2+lg5)+lg5+2
=2+lg2+lg5+2
=5