(1-122)×(1-132)×(1-142)×…(1-1152)=______.-数学

题目简介

(1-122)×(1-132)×(1-142)×…(1-1152)=______.-数学

题目详情

(1-
1
22
)
×(1-
1
32
)
×(1-
1
42
)
×…(1-
1
152
)
=______.
题型:填空题难度:中档来源:不详

答案

(1-class="stub"1
22
)
×(1-class="stub"1
32
)
×(1-class="stub"1
42
)
×…(1-class="stub"1
152
)

=(1-class="stub"1
2
)×(1+class="stub"1
2
)×(1-class="stub"1
3
)×(1+class="stub"1
3
)×…×(1-class="stub"1
15
)×(1+class="stub"1
15

=class="stub"1
2
×class="stub"3
2
×class="stub"2
3
×class="stub"4
3
×class="stub"3
4
×…×class="stub"14
15
×class="stub"16
15

=class="stub"1
2
×class="stub"16
15

=class="stub"8
15

故答案为:class="stub"8
15

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