Question

10th term of anA.p 10,7,4​

Answer 1

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10th term of anA.p 10,7,4

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Given :10,7,4

=>a=10;A2=7

=>D=A2-a

=>7-10=-3

$\bold{D=-3}$

D stands for common difference between two AP.

e.g=2,4,6,8 if we say D is 2 then it means common difference is 2 between AP's term.

Now ,to find 10th term of an AP

$= > a10 = a + 9d$

$= > a10 = 10 + 9( - 3)$

$= > a10 = 10 - 27 = - 17$

Therefore,The 10th term of an AP is -17

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