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Question

Simplify : 214.418.8116.16132......

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Solution

214×228×2316×2432×2564......

P=(2)14+28+316+432+564+....

P=(2)S ……………… (1)


Where S=14+28+316+432+564+.... ..... (2)

S×(12)=18+216+332+464+....+ ……. (3)

On subtracting equation (3) from (2), we get

S2=14+18+116+132+164+......

S2=a1r=14112.

S2=14×21.

S2=12

S=1

Put S=1 in eq.(1).

P=(2)S.

P=(2)1

P=2


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