Question

*इनमे में से कौन सा उस समांतर श्रेढ़ी के nवें पद का सूत्र है जिसका पहला पद 'A' और सार्व अंतर 'D' है?* 1️⃣ A + D 2️⃣ A + (n + 1)d 3️⃣ A + (n - 1)D 4️⃣ A + nD​

Answer 1

Answer:

3️⃣ A + (n - 1)D

Step-by-step explanation:

Given that A is the firest term and comman difference is D.

To find the formula of arthematic series by using above data.

So,

    formula of A.P. for Tn terms = a + (n-1)d

      where, a = first term

                   n = nth term

                   d = comman difference

Here, a = A and d = D.

∴ Tn = A+(n-1)D

Therefore, option 3️⃣ A + (n - 1)D is correct option.

THANKS.

Answer 2

Answer:

A+(n-1)D third option

Step-by-step explanation:

Concept

• The differences between each succeeding term are the same in an arithmetic progression (AP). An arithmetic progression can be used to calculate the AP's nth term.

Given

First term=A

Difference between=D

Find

Formula

Solution

Formula of AP for nth term=a+(n-1)d

Where , a=First term

              d=Difference

Now according to question a=A and d=D

then new formula will be=A+(n-1)D

#SPJ3