Question

Which term of the ap 5,15,25,.... will be 130 more than its 31st term ?

Answer 1

Answer:

Let the term be An,

An = A₃₁ + 130

An = a + 30d + 130 -(1)

Now, a = 5, d = 10  -(2)

An = a + 30d + 13x10     {from 1}

An = a + 30d +  13d       {from 2}

An = a + 43d

An = A₄₄

Ans: 44th term