问题
填空题
计算:
|
答案
∵log47+log249=log2
+log249=log277
=5 2
log27,5 2
=log72,ln2 ln7
∴
•(log47+log249)•2 5
=ln2 ln7
•2 5
log27•log72=1.5 2
故答案为:1.
计算:
|
∵log47+log249=log2
+log249=log277
=5 2
log27,5 2
=log72,ln2 ln7
∴
•(log47+log249)•2 5
=ln2 ln7
•2 5
log27•log72=1.5 2
故答案为:1.