Question

the n th term of the AP IS 3,8,13,18,.....is 148.find n

Answer 1

a=3
d=8-3=5
an=148
an=a+(n-1)×d
148=3+(n-1)×5
148-3=5n-5
145+5=5n
150=5n
150/5=n
30=n
n=30

Answer 2

Answer:

Step-by-step explanation:an=148

d=5

a1=3

an=a+(n-1)d

148=3+(n-1)3

148-3=(n-1)3

145=(n-1)3

n-1=145/3

n-1=29

n=29=1

n=30