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V125BC [204]
3 years ago
7

Which sequence has nth term 2n+5 a)7,21,35, b)7,9,11,13 c)1,4,9,16

Mathematics
1 answer:
muminat3 years ago
6 0

Answer:

The answer is b.Look below for details.

Step-by-step explanation:

Question no 1. The sequence has the common difference of 14.

t1=7

t2=21

t3=35

We have

tn=a+(n-1)d

=7+(n-1)14

=7+14n-14

=14n-7(Its not our answer)

Lets try b.

The common difference is 2 in this sequence.

t1=7

t2=9

t3=11

t4=13

We have

tn=7+(n-1)2

=7+2n-2

=2n+5(Its is our answer.) Got it.

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