zeca 3p-1. The sum of the 62. The p...
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zeca 3p-1. The sum of the 62. The pth term of an AP is – 6 . The sum of first n terms of the AP is (a) n(3n+1) (b) F (3n+1) (©) (3n-1) (d) None of these 63. The sum of all natural numbers from 100 to 300 which are divisible by 4 is

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[ begin{aligned} t_{p} &=f-text { th teren } &=3 p-1 end{aligned} ] ( therefore t_{1}=f ) iscot torm [ begin{aligned} =3 cdot 1-1 &: pm_{2}=operatorname{second} text { tarm } =2 &=3 cdot 2-1 &=5 end{aligned} ] ( 0^{circ} cdot operatorname{trcot} operatorname{tar} m, a=2 ) ( therefore ) isternon difference, ( d=t_{2}-t_{1} ) [ begin{array}{l} =5-2 =3 end{array} ] o. &um of firct n- terms, Son [ begin{array}{l} =frac{n}{2}[2 cdot 2+(n-1) cdot 3] =frac{n}{2}[4+3 n-3] =frac{(3 n+1) cdot n}{2}(A m) end{array} ]
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