Question

If a12=119 a9=9 then find common difference.

Answer 1

$\huge\underline\mathfrak\purple{★ ANSWER : }$

Given that,

• a12 = 119
• a9 = 9

We can write these terms as,

• a12 → a + 11d = 119 ..... (1)
• a9 → a + 8d = 9 ..... (2)

Subtract the equations (1) & (2). We get,

➡ 3d = 110

➡ d = 110/3

$\boxed{∴ common \: \: difference (d) = \frac{110}{3} }$

Step-by-step explanation:

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