题目内容
设a=
+
,b=
+
+
,则在a与b中,较大的数是______.
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 6 |
| 1 |
| 7 |
a=
+
=
+
=
;
b=
+
+
=
+
+
=
;
再次通分:
=
=
;
=
=
;
所以a较大;
故填:a.
| 1 |
| 3 |
| 1 |
| 4 |
| 4 |
| 12 |
| 3 |
| 12 |
| 7 |
| 12 |
b=
| 1 |
| 5 |
| 1 |
| 6 |
| 1 |
| 7 |
| 42 |
| 210 |
| 35 |
| 210 |
| 30 |
| 210 |
| 107 |
| 210 |
再次通分:
| 7 |
| 12 |
| 7×35 |
| 12×35 |
| 245 |
| 420 |
| 107 |
| 210 |
| 107×2 |
| 210×2 |
| 214 |
| 420 |
所以a较大;
故填:a.
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