Question

Find the 10th element in the series 5,15,35,45.....



a.85



b.95



c.90



d.Cannot be determined

Answer 1

Answer:

a=5

d =15-5=10

n=10

now a10=a+9d

5+9*10

5+90

95

means b is correct option

Answer 2

Answer: b) 95 is the 10th term of the given series

Step-by-step explanation:

Given the series

5,15,25,35,45,55 ........ is an AP

whose first term a= 5 and common difference d= 10

n= 10

As we know

$a_n=a+(n-1)d\\\\\Rightarrow a_{10}= 5+(10-1)10= 5+90= 95$

Hence, the 10th term of the given series is 95