1×2+2×4+3×6+4×8+···+100×200=这是奥数中数列求和的问题,最好配上讲解,我的金币不多,但也会给点意思意思,
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1×2+2×4+3×6+4×8+···+100×200=这是奥数中数列求和的问题,最好配上讲解,我的金币不多,但也会给点意思意思,1×2+2×4+3×6+4×8+···+100×200=这是奥数中数列
1×2+2×4+3×6+4×8+···+100×200=这是奥数中数列求和的问题,最好配上讲解,我的金币不多,但也会给点意思意思,
1×2+2×4+3×6+4×8+···+100×200=
这是奥数中数列求和的问题,最好配上讲解,我的金币不多,但也会给点意思意思,
1×2+2×4+3×6+4×8+···+100×200=这是奥数中数列求和的问题,最好配上讲解,我的金币不多,但也会给点意思意思,
1×2+2×4+3×6+4×8+···+100×200
=1(1*2)+2(1*2)+3*(1*2).100(1*2)
=(1+2+.100)*(1*2)
=5050*2
=10100
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