`(23.1)^(2)+(48.6)^(2)-(39.8)^(2)=?+1147.69`

The value of ((2.3)^(3)-.027)/((2.3)^(2)+.69+.09) is (a) 0 (b) 1.6(c)2(d)3.4 is (a)0(b)

The value of ((2.3)^(3)-0.027)/((2.3)^(2)+0.69+0.09) is 2(b)3(c)2.327(d)2.273

(1)/(2.3)+(1)/(4.5)+(1)/(6.7)+(1)/(8.9)+...

Which of the following relations are functions? Give reasons. If it is a function, determine its domain and range: (i) {(2,1), (3,1),(4,2)} (ii) {(2,2),(2,4),(3,3),(4,4)} (iii) {(2,1),(5,1),(8,1),(11,2),(14,2),(17,2)} (iv) {(1,2),(2,3),(3,4),(4,5),(5,6),(6,7)} (v){(2,1),(4,2),(6,3),(8,4),(10,5)} (vi) {(1,2),(2,3),(3,4),(3,5),(3,7),(4,8)}

The number of values of r satisfying the equation 69C_(3r-1)-69C_(r^(2))=^(69)C_(r^(2)-1)-6 is a.1 b.2 c.3d.7

If (48)/(2.3)+(47)/(3.4)+(46)/(4.5)+ . . . +(2)/(48.29)+(1)/(49.50) =(51)/(2)+k(1+(1)/(2)+(1)/(3)+ . . .+(1)/(50)) , then k equals

If (48)/(2.3)+(47)/(3.4)+(46)/(4.5)+ . . . +(2)/(48.49)+(1)/(49.50) =(51)/(2)+k(1+(1)/(2)+(1)/(3)+ . . .+(1)/(50)) , then k equals