Question

Which term of arithmetic progression 5,15,25,......will be 130 more than it's 31 st term

Answer 1

Answer:

Step-by-step explanation:

Ap:5,15,25......

a=5 ..(1)

d=10 ..(2)

we know that 31st term can be written as a+30d

As per data the ‘n’th number will be 130+a+30d

Applying 1,2

130+5+30(10)=435 .....an

an = a+(n-1)d

435=5+(n-1)10

435-5=(n-1)10

430/10=(n-1)

43=n-1

43+1=n

n=44