If `(10^(12)+25)^2-\ (10^(12)-25)^2=10^n ,` then the value of n is 5 (b) 10 (c) 14 (d) 20

If (10^(12)+25)^(2)-backslash(10^(12)-25)^(2)=10^(n), then the value of n is 5 (b) 10(c)14 (d) 20

If .^(n)P_(3)+.^(n)C_(n-2)=14n , the value of n is (a) 5 (b) 6 (c) 8 (d) 10

If sqrt(3^(n))=729, then the value of n is (a)6(b)8(c)10(d)12

If log_(10) sin x+log_(10)cos x=-1 and log_(10)(sinx+cosx)=(log_(10)n-1)/2 then the value of n is (a) 24 (b) 36 (c) 20 (d) 12_

If .^(20)C_(n+1) = ^ (n) C_(16) , then the value of n is a.7 b. 10 c. 13 d. None of these

If the arithmetic mean of 7,\ 5,\ 13 ,\ x and 9 is 10 , then the value of x is (a) 10 (b) 12 (c) 14 (d) 16

If log_(10)sin x+log_(10)cos x=-1 and log_(10)(sin x+cos x)=(log_(10)n-1)/(2) then the value of n is (a) 24 (b) 36(c)20(d)12

If area of an equilateral triangle inscribed in the circle x^2+y^2+10x+12y+c=0 is 27sqrt3 , then the value of c is (a) 25 (b) -25 (c) 36 (d) -36

If n=10 , X =12 and sumx_(i)^2=1530 , then the coefficient of variation is (a) 36% (b) 41% (c) 25% (d) none of these

The truth value of "10 + 2 = 12 and 10 xx 2 = 20 " is