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In boolean algebra A+A+A.....A is same as

a.0
b.A
c.n*A
d.A^n

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RRB Other Question

sum of squares of three consecutive odd numbers is 2531.Find these 3 odd numbers? The power of single phase Ac circuit is

a.VI
b.VIcos(phi)
c.VIsin(phi)
d.none of these