已知函数f(x)=x3-3x2-sinπx,则f(12013)+f(22013)+…+f(40242013)+f(40252013)=( )A.40
已知函数f(x)=x3-3x2-sinπx,则f(12013)+f(22013)+…+f(40242013)+f(40252013)=()A.4025B.-4025C.8...
已知函数f(x)=x3-3x2-sinπx,则f(12013)+f(22013)+…+f(40242013)+f(40252013)=( )A.4025B.-4025C.8050D.-8050
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∵f(x)=x3-3x2-sinπx,
∴f(
)+f(
)+…+f(
)+f(
)
=[(
)3-3(
)2-sin(
)]+[(
)3-3(
)2-sin(
)]
+…+[(
)3-3(
)2-sin(
)]
=
-3×
=
-3×
=
-
=
=4025×
=-8050.
故选:D.
∴f(
1 |
2013 |
2 |
2013 |
4024 |
2013 |
4025 |
2013 |
=[(
1 |
2013 |
1 |
2013 |
π |
2013 |
2 |
2013 |
1 |
2013 |
2π |
2013 |
+…+[(
4025 |
2013 |
4025 |
2013 |
4025π |
2013 |
=
13+23+…+40253 |
20133 |
12+22+…+40252 |
20132 |
=
[
| ||
20133 |
| ||
20132 |
=
40252?20132 |
20133 |
4025?2013?8051 |
20132 |
=
4025(4025?8051) |
2013 |
=4025×
?4026 |
2013 |
=-8050.
故选:D.
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