Question

0
If AN=A+(N-1×D) then ​

Answer 1

a = First term

d = Common difference

n = number of terms

an = nth term

hope it will help u ✨☺️

Answer 2

Step-by-step explanation:

The other side of the traingle =

\begin{gathered} = \sqrt{(b + 1)(b - 1)} \\ = \sqrt{ {b}^{2} - {1}^{2} } \\ = \sqrt{ {b}^{2} - 1 } \end{gathered}

=

(b+1)(b−1)

=

b

2

−1

2

=

b

2

−1