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Write the correct number in the given bo...

Write the correct number in the given boxes from the following A.P.
`-3,-8, -13, -18`,…..
Here, `t_(1) = square, t_(2) = square, t_(3)=square, t_(4)=square, t_(2)-t_(1) =square, t_(3)-t_(2)=square therefore a =square, d=square`

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The correct Answer is:
`t_(1) =-3, t_(2) = -8, t_(3)=-13, t_(4)=-18, t_(2)-t_(1) = -5, t_(3)-t_(2) = -5, therefore a=-3, d=-5`
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