Math, asked by chetan21moturi, 2 months ago

What is the common difference of an A.P. in which a21 – a7 = 84?

Answers

Answered by Vincent2021

2

Answer:

a21 – a7 = 84 …[Given

∴ (a + 20d) – (a + 6d) = 84 …[A'n = a + (n – 1)d

20d – 6d = 84

14d = 84 ⇒ d 84/14 = 6

Answered by Anonymous

0

Step-by-step explanation:

a+20d-a-6d =84

14d = 84

D = 6

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