3. (13.0625) is a double number equal to 10

If in the expansion of (x^(3)-(2)/(sqrt(x)))^(n) a term like x^(2) exists and 'n' is a double digit number, then least value of 'n' is (a) 10 (b) 11 (c) 12 (d) 13

If in the expansion of (x^(3)-(2)/(sqrt(x)))^(n) a term like x^(2) exists and 'n' is a double digit number, then least value of 'n' is (a) 10 (b) 11 (c) 12 (d) 13

A number is multiplied by 13 and reduced by 7 is equal to 71. Then the number is__

The number of electrons,protons and neutrons in a species are equal to 10 , 12 and 13 respectively.Assign the proper symbol to the species.

((1)/(1.4 )+ (1)/(4.7 ) +(1)/(7.10 )+(1)/(10.13 )+(1)/(13.16)) is equal to