Question

In an AP:
(1) given a = 5, d=3, a = 50, find n and
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Answer 1

Answer:

16

Step-by-step explanation:

Tn =50

a=5

d=3

Tn=a+(n-1)d

=> 50= 5+(n-1)3

=>45=(n-1)3

=>15=n-1

=>n=16(Ans)

Answer 2

Answer:

last term =a+(n-1)d

then 50=5+(n-1)3

45=(n-1)3

45/3=n-1

15=n-1

n=15+1

n=16