Question

Which term of the AP:5,15,25...... will be 130 more than its 31th term?

Answer 1

a = 5 .

d = 15 - 5 = 10

31 st term = 5 + ( 31 - 1 ) 10

= 5 + 30(10)

= 305 .

Now the term 130 more than 31st term = 305+130 = 435 .

Let 435 be the n th term of A. P

435 = 5 + ( n - 1 ) 10


435 = 5 + 10n - 10

435 = 10n - 5

440 = 10n

n = 44 .

44th term of A. P would be 130 more than its 31 st term

Answer 2

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