If `N=(2^(log_(70)9800))(5^(log_(70)140))(7^(log_(70)2))` then `N` is equal to 20 (b) 60 (c) 18 (d) 40

If N=(2^(log_(7)9800))(5^(log_(pi)140))(7^(log_(70)2)) then N is equal to 20(b)60(c)18(d)40

If log_(b)(n)=2 and log_(n)(2b)=2, then b is equal to

let N =(log_(3) 135/log_(15) 3) - (log_(3) 5/log_(405) 3) , then N equals

If log_(70)7=x,log_(70)5=y then log_(70)4=

N=log_(2)5*log_((1)/(6))2*log_(3)((1)/(6)),then3^(N) is equal to

Let n=2006!. Then 1/(log_(2)n)+1/(log_(3)n)+…+1/(log_(2006)n) is equal to :

If sum_(r=0)^(n-1)log_(2)((r+2)/(r+1)) =prod_(r=10)^(99)log_(r) (r+1), then 'n' is equal to (A) 4 (B) 3 (C) 5 (D) 6

If x=log_(k)b=log_(b)c=(1)/(2)log_(c)d, then log_(k)d is equal to

The value of log_(2)20log_(2)80-log_(2)5log_(2)320 is equal to a)5 b)6 c)7 d)8

If log_(10)x+log_(10)5=2, then x equals a.15b20c.25d.100