(+y,”=2+nP=2+n+nl ≤2+n广+2+nnl 应用Holder不等式 25+n产2+n][② 2s+nn[2+n][空]形 (-q-P 6( ) p n n p p 1 p ii ii ii i 1 i 1 n n p 1 p 1 ii i ii i i 1 i 1 x y − = = − − = = + = ξ +η = ξ +η ξ +η ≤ ξ +η ξ + ξ +η η ∑ ∑ ∑ ∑ 应用 Hölder 不等式 ( ) 1 1 nn n q p p 1 p 1q p ii i ii i i 1 i 1 i 1 − − = = =    ξ +η ξ ≤ ξ +η ξ       ∑∑∑ ( ) 1 1 nn n q p p 1 p 1q p ii i ii i i 1 i 1 i 1 − − = = =    ξ +η η ≤ ξ +η η       ∑∑∑ ( ) 1 1 1 p 1q p p q + =⇒ − = 6