问题
解答题
(1)计算:2
(2)计算:2log510+log50.25. |
答案
解(1)计算:2
×3
×3 15 6 12
=2
×6 33
×6 (
)23 2 6 12
=26 33×(
)2×123 2
=2
=6;6 36
(2)2log510+log50.25
=log5102+log50.25
=log5100×0.25
=log525
=2log55=2.
(1)计算:2
(2)计算:2log510+log50.25. |
解(1)计算:2
×3
×3 15 6 12
=2
×6 33
×6 (
)23 2 6 12
=26 33×(
)2×123 2
=2
=6;6 36
(2)2log510+log50.25
=log5102+log50.25
=log5100×0.25
=log525
=2log55=2.