已知各項(xiàng)均為正數(shù)的數(shù)列{an}滿足a1=1,(an+1-an)(an+1+an)=2n+1.
(1)求數(shù)列{an}的通項(xiàng)公式;
(2)記bn=an2an,求數(shù)列{bn}的前n項(xiàng)和Sn.
b
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2
a
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【考點(diǎn)】錯(cuò)位相減法.
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發(fā)布:2024/5/11 8:0:9組卷:143引用:4難度:0.5
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