math sign
∑ni=0i2=(n2+n)(2n+1)6 ∑ i = 0 n i 2 = ( n 2 + n ) ( 2 n + 1 ) 6
∑i=0ni2=ab ∑ i = 0 n i 2 = a b
∑i=0ni2=(n2+n)(2n+1)6 ∑ i = 0 n i 2 = ( n 2 + n ) ( 2 n + 1 ) 6
∑j?0mj2+j3a+bc+d ∑ j ? 0 m j 2 + j 3 a + b c + d
αβωΓΔΩ α β ω Γ Δ Ω
x2ilog2x x i 2 log 2 ? x
∑i=0∞i2 ∑ i = 0 ∞ i 2
∏05i2 ∏ 0 5 i 2
∫30 ∫ 0 3
limx→0 lim x → 0
∞ ∞
? ?
111xyzx2y2z2 1 x x 2 1 y y 2 1 z z 2
d(H1,H2)=∑i(H1(I)?H1ˉ)(H2(I)?H2ˉ)∑I(H1(I)?H1ˉ)2∑I(H2(I)?H2ˉ)2????????????????????????????√ d ( H 1 , H 2 ) = ∑ i ( H 1 ( I ) ? H 1 ˉ ) ( H 2 ( I ) ? H 2 ˉ ) ∑ I ( H 1 ( I ) ? H 1 ˉ ) 2 ∑ I ( H 2 ( I ) ? H 2 ˉ ) 2
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