1. only I is true
2. only II is true
3. both I and II are true
4. neither I nor II true
both I and II are true
1. a,b,c
2. b,c,a
3. c,a,b
4. a,c,b
c,a,b
1. a,b,c
2. b,c,a
3. c,a,b
4. c,b,a
c,b,a
1. n(n+1)(n+2)/6
2. n(n+1)(3n2+23n+46)/12
3. n(27n3+90n2+45n-50)/4
4. n(n+1)(2n+1)/6
n(n+1)(n+2)/6
1. n(n+1)(n+2)/6
2. n(n+1)(3n2+23n+46)/12
3. n(27n3+90n2+45n-50)/4
4. n(n+1)(2n+1)/6
n(n+1)(2n+1)/6
1. a,b,c
2. b,c,a
3. c,a,b
4. a,c,b
a,b,c
1. (3n-1)3/2.4n-1
2. (3n-1)/2.3 (n-1)(n+2)/2
3. (3n+1)/3.7n-1
4. none
(3n-1)/2.3 (n-1)(n+2)/2
1. a,b,c
2. b,c,a
3. c,a,b
4. a,c,b
a,b,c
1. n(n+1)(n2+n+2)/8
2. n(n+1)(n2-n+2)/8
3. n(n-1)(n2+n+2)/8
4. n(n-1)(n2-n+2)/8
n(n+1)(n2+n+2)/8
1. 2n(2n+2n-1-1)
2. 2n-1(2n+2n-1-1)
3. 2n-2(2n+2n-1-1)
4. none
2n-2(2n+2n-1-1)