Question

the 4th term of an Ap is zero .prove that its AP is 25 th term is tripple its 11th Term​

Answer 1

To Prove :

• 25th term is tripple of 11th term

Proof :

t(4) = a+3d = 0

⇒a=-3d

t(25) = a +24d

= -3d +24d

= 21d.

t(11) = a + 10d

= -3d + 10d

= 7d

therefore , t(25) = t(11) × 3

Hence proved !!