计算:lg눀2+lg눀5+2lg2lg5= 急啊

2025-06-28 00:24:15
推荐回答(2个)
回答1:

lg²2+lg²5+2lg2lg5
=(lg2+lg5)²

=(lg2*5)²
=1²
=1

回答2:

lg²2+lg²5+2lg2lg5
=(lg2+lg5)²
=lg²(2×5)
=lg²10
=1