tn=2n3(n+1)!;n≥1; will be the general term of the sequence.
Let's find the next term:
tn+1=2(n+1)3((n+1)+1)!=2(n+1)3(n+2)!=
=2(n+1)3(n+2)(n+1)n×...×1=2(n+1)3(n+2)(n+1)!nn=
=2n3(n+1)!n+1n(n+2)=tnn+1n(n+2)=n+1n(n+2)tn.
Also we have to find the first term:
t1=2⋅13(1+1)!=23⋅2!=23⋅2=3.
So, the recursive definition of the sequence is as follows:
t1=3,
tn+1=n+1n(n+2)tn.
Answer:
t1=3,
tn+1=n+1n(n+2)tn.
But if we have 2n in denominator, the solution is the next:
tn=2n3(n+1)!;n≥1; will be the general term of the sequence.
Let's find the next term:
tn+1=2n+13((n+1)+1)!=2n+13(n+2)!=
=2n⋅213(n+2)(n+1)n×...×1=2n3(n+1)!2n+2=tn2n+2.
Also we have to find the first term:
t1=213(1+1)!=23⋅2!=23⋅2=3.
So, the recursive definition of the sequence is as follows:
t1=3,
tn+1=2n+2tn.
Answer:
t1=3,
tn+1=2n+2tn.
Comments