Question

The nth term of a sequence is (2n-3) , find its fifteenth term

Answer 1

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nth term is equal to. a+(n-1)d

a+(n-1)d= 3n + 5

On opening bracket

dn + (a-d)= 3n + 5.

On comparing both the sides.

dn= 3n therefore d=3.

Also a-d = 5

a-3 =5

a= 8

fifteenth term = 8+ (15–1)×3
fifteenth term = 8+ 42

The answer is 50

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Answer 2

Answer: 15th term = 27

Step-by-step explanation:

since

nth term =(2n-3)

then 15th term=2x15-3

                      = 30 - 3

                     = 27

hence answer is =27