函數(shù)f(x)=-3loga的圖象必過的定點(diǎn)坐標(biāo)是 查看更多

 

題目列表(包括答案和解析)

已知函數(shù)f(x)=3x2+1,g(x)=2x,數(shù)列{an}滿足對(duì)于一切n∈N*有an>0,且f(an+1)-f(an)=g(an+1+
3
2
)
.?dāng)?shù)列{bn}滿足bn=logana,設(shè)k,l∈N*,bk=
1
1+3l
,bl=
1
1+3k

(1)求證:數(shù)列{an}為等比數(shù)列,并指出公比;
(2)若k+l=9,求數(shù)列{bn}的通項(xiàng)公式.
(3)若k+l=M0(M0為常數(shù)),求數(shù)列{an}從第幾項(xiàng)起,后面的項(xiàng)都滿足an>1.

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已知函數(shù)f(x)=
x(x2+3)
3x2+1
,數(shù)列{an}滿足對(duì)于一切n∈N*有an>1,且an+1=f(an).?dāng)?shù)列{bn}滿足,bn=
1
loga(ln
an-1
an+1
)
(a>0且a≠1)設(shè)k,l∈N*,bk=
1
1+3l
,bl=
1
1+3k

(Ⅰ)求證:數(shù)列{ln
an-1
an+1
}
為等比數(shù)列,并指出公比;
(Ⅱ)若k+l=5,求數(shù)列{bn}的通項(xiàng)公式;
(Ⅲ)若k+l=M0(M0為常數(shù)),求數(shù)列{abn}從第幾項(xiàng)起,后面的項(xiàng)都滿足abn>1

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已知函數(shù)f(x)=3x2+1,g(x)=2x,數(shù)列{an}滿足對(duì)于一切n∈N*有an>0,且f(an+1)-f(an)=g(an+1+
3
2
)
.?dāng)?shù)列{bn}滿足bn=logana,設(shè)k,l∈N*,bk=
1
1+3l
,bl=
1
1+3k

(1)求證:數(shù)列{an}為等比數(shù)列,并指出公比;
(2)若k+l=9,求數(shù)列{bn}的通項(xiàng)公式.

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已知函數(shù)f(x)=3x2+1,g(x)=2x,數(shù)列{an}滿足對(duì)于一切n∈N*有an>0,且f(an+1)-f(an)=g(an+1+
3
2
)
.?dāng)?shù)列{bn}滿足bn=logana,設(shè)k,l∈N*,bk=
1
1+3l
bl=
1
1+3k

(1)求證:數(shù)列{an}為等比數(shù)列,并指出公比;
(2)若k+l=9,求數(shù)列{bn}的通項(xiàng)公式.
(3)若k+l=M0(M0為常數(shù)),求數(shù)列{an}從第幾項(xiàng)起,后面的項(xiàng)都滿足an>1.

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