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Find the 19th term of the A.P. 7,13,19,2...

Find the 19th term of the A.P. 7,13,19,25,….

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The correct Answer is:
The 19th term is 104.
Here, `a=t_(1)=7,t_(2)=13,t_(3)=19,t_(4)=25,...`
`d=t_(2)-t_(1)=13-7=6`
`t_(n)=a+(n-1)d` …(Formula)
`thereforet_(19)=7+(19-1)xx6` …(Substituting the values)
`=7+18xx6`
`=7+108`
`thereforet_(19)=115`
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