中学序列函数的组合

根据导数函数:

穿过原点,c

=0;

y

=

2x?

[加在以-u结尾的法语词源的名词之后构成复数]

点(n,Sn)在f(x)上,

=2n?

-

n;

S(n-1)

=2(n-1)?

-(n-1);

标准语

-S(n-1)

=

2(2n-1)

-1

=4n

-3 = a(n);

a1

=4*1

-3

=1;

(2)b(n)

=

2/(4n-3)(4n+1)

=(1/2)((1/(4n-3))

-

(1/(4n+1));

T[n]=

1/2(1/1

-1/5

+1/5

-1/9

+...

+

-(1/(4n+1)))

=

1/2

(1

-

(1/(4n+1))

=

2n/(4n+1)

2n

m

______

& lt______

4n

+1

2008

因为2n/(4n+1)

=1/2

-(1/2)/(1+4n)& lt;1/2,

并且是递增的函数,

m/2008

& gt=

1/2是

你可以拉,

m

& gt=1004

m

=1004是最小的整数。