Write down in terms of n, expression for the nth term of the following sequences a) 2 5 8 11 14 b) 9 11 13 15 17
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Step-by-step explanation:
For first sum,
The given sequence is 2,5,8,11,14
d= t2-t1= 5-2=3
a= 2
tn=a+(n-1)d
tn=2+(n-1)3
tn=2+3n-3
tn=3n-1
For second sum,
The given sequence is 9,11,13,15,17
d=t2-t1=11-9=2
a=9
tn=a+(n-1)d
tn=9+(n-1)2
tn=9+2n-2
tn=2n+7
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