Question

if the nth term of an ap is 4n2 _1,the 8th term is ​

Answer 1

Answer:

255

Step-by-step explanation:

The 8^{th}8th term of the AP is 255.

Given:

The n^{th}nth term of an AP is4n^2-14n2−1

To find:

8^{th}8th term of an AP

Solution:

The arithmetic progression sequence can be represented as  a, a + d, a + 2d,

Where a = first term, difference between two terms = d

a_{n}=4 n^{2}-1an=4n2−1

a_{8}=4(8)^{2}-1a8=4(8)2−1

a_{8} =4 \times 64 – 1a8=4×64–1

= 256 – 1

a^8= 255a8=255

Answer 2

Step-by-step explanation:

a(n)=4n(2)-1an=4n2-1

a(8)=4(8)(2)-1a8=4(8)2-1

a(8)=4 64-1a8=×64-1

=256-1

a 8 =255 a8=255