If `(log)_4 5=aa n d(log)_5 6=b ,` then `(log)_3 2` is equal to `1/(2a+1)` (b) `1/(2b+1)` (c) `2a b+1` (d) `1/(2a b-1)`

If log_(4)5=a and log_(5)6=b, then log_(3)2 is equal to (1)/(2a+1) (b) (1)/(2b+1)(c)2ab+1(d)(1)/(2ab-1)

If (log)_3x=aa n d(log)_7x=b , then which of the following is equal to (log)_(21)x ? a. a b b. (a b)/(a^(-1)+b^(-1)) c. 1/(a+b) d. 1/(a^(-1)+b^(-1)

If (log)_3x=a and (log)_7x=b , then which of the following is equal to (log)_(21)x ? a b (b) (a b)/(a^(-1)+b^(-1)) 1/(a+b) (d) 1/(a^(-1)+b^(-1))

If log_(sqrt(3))5=a and log_(sqrt(3))2=b , then log_(sqrt(3))300 is equal to a) 2(a+b) b) 2(a+b+1) c) 2(a+b+2) d) a+b+4

If (a+(log)_4 3)/(a+(log)_2 3)=(a+(log)_8 3)/(a+(log)_4 3)=b ,then b is equal to 1/2 (2) 2/3 (c) 1/3 (d) 3/2

If (a+(log)_4 3)/(a+(log)_2 3)=(a+(log)_8 3)/(a+(log)_4 3)=b ,then b is equal to 1/2 (2) 2/3 (c) 1/3 (d) 3/2

If (a+(log)_4 3)/(a+(log)_2 3)=(a+(log)_8 3)/(a+(log)_4 3)=b ,then b is equal to 1/2 (2) 2/3 (c) 1/3 (d) 3/2

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

If log ((a + b)/(2)) = (1)/(2) (log a + log b) , then a is equal to