Question

find common difference of an .AP. 1.-3-7.11​

Answer 1

CORRECT QUESTION :-

Find common difference of an AP 1 , -3 , -7 , -11 .

ANSWER :-

Given AP to us is 1 , -3 , -7 , -11 . So we know we can find the common difference as ,

➳ Common Difference = Difference of two consecutive terms .

⇝ CD = Second term - Firsrt term.

⇝ CD = - 7 - (-3) .

⇝ CD = -7 + 3.

⇝ CD = -4 .

Hence the common difference is (-4) .

✒️ More related formulae :-

★ T n = a + ( n - 1 ) d

★ S n = n/2 [ 2a + (n-1)d ]

Answer 2

Answer:

-2 is the answer I think soo......

Step-by-step explanation:

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