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For what value of n are the n\'th term of 2 a.p 63,65,67.........and 3,10,17.............

Answer» In first term A=63 , d=a2-a1=65-63=2D=2, an=2an=a+(n-1)+d2=65+(n-1)+22-2=65+(n-1)0=65+(n-1)65=n-165+1=n66=n
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