Question

show that the sequence defined by an= 4n+5 is an AP.Also , find its common difference

Answer 1

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Answer 2

Given ; an= 4n+5

To Find; show that the sequence defined by an= 4n+5 is an AP. Also , find its common difference

Solution ; an= 4n+5

The numbers can find out by putting the values of n as 1, 2, 3 and so on

a1= 4+5=9

a2=4*2+5=13

a3= 4*3+5=17

a2-a1=a3-a2=4

Hence it is ap with common difference 4