A sequence of terms u1,u2,u3 ,...is defined by
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A sequence of terms u1,u2,u3 ,...is defined by
\x05\x05Un = 2n+5\x05 and\x05for n >or= 1.
(i)\x05Write down the values of u1,u2 and u3.
(ii)\x05State what type of sequence it is.
\x05\x05Un = 2n+5\x05 and\x05for n >or= 1.
(i)\x05Write down the values of u1,u2 and u3.
(ii)\x05State what type of sequence it is.
![A sequence of terms u1,u2,u3 ,...is defined by](/uploads/image/z/15659991-63-1.jpg?t=A+sequence+of+terms+u1%2Cu2%2Cu3+%2C...is+defined+by)
u1=2X1+5=7
u2=2X2+5=9
u3=2X3+5=11
这应该是一个等差数列:this is arithmetic progression
u2=2X2+5=9
u3=2X3+5=11
这应该是一个等差数列:this is arithmetic progression
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