Math, asked by pranjal29106, 12 hours ago

If for any A.P , d = - 9 then t15 - t12??

Answers

Answered by durgasethu701

0

-27

Step-by-step explanation:

d = -9

t15 = a + 14d

t12 = a + 11d

t15 - t12 = a + 14d - (a +11d)

= a + 14×-9 -a -11×-9

= -126 + 99

= - 27

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