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Find the 27^(th) term of the following A...

Find the `27^(th)` term of the following A.P.
9, 4, -1,-6,-11,…

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The correct Answer is:
The 27th term is - 121
Here, `a=t_(1)=9,t_(2)=4,t_(3)=-3,t_(4)-6,`
`t_(5)=-11,...`
`d=t_(2)-t_(1)=4-9=-5`
`t_(n)=a+(n-1)d` " "….(Formula)
`thereforet_(27)=9+(27-1)xx(-5)` ….(Substituting the values)
`=9+26xx(-5)=9-130`
`thereforet_(27)=-121`
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