`(3 7 / 11*11/5)`÷`(3/7*x)`=`4/3`

7/11+(-3)/11

If x : y=1:1,\ t h e n\ (3x+4y)/(5x+6y)= (a) 7/(11) (b) (17)/(11) (c) (17)/(23) (d) 4/5

If x : y=1:1,\ t h e n\ (3x+4y)/(5x+6y)= (a) 7/(11) (b) (17)/(11) (c) (17)/(23) (d) 4/5

Which of the following are like fractions? (a) 3/5,3/7,3/(11),3/(16) (b) 5/(11),7/(11),(15)/(11),2/(11) (c) 2/3,3/4,4/5,6/7 (d) None of these

The sum of the infinite series (1)/(3)+(3)/(3.7)+(5)/(3.7.11)+(7)/(3.7.11.15)+"…………" is

Which is greater: (3)/(11) of (2)/(5) or (4)/(7) of (5)/(8) ?

Evaluate : (i) (3)/(7)+(-4)/(9)-(-11)/(7)-(7)/(9)

Evaluate : (i) (3)/(7)+(-4)/(9)+(-11)/(7)+(7)/(9)

Prove the following by the principle of mathematical induction: 1/(3. 7)+1/(7. 11)+1/(11. 15)+.....+1/((4n-1)(4n+3))=n/(3(4n+3))

Find the sum to n terms of the series (1)/(1*3*5*7*9)+(1)/(3*5*7*9*11)+(1)/(5*7*9*11*13)+"......" . Also, find the sum to infinty terms.