" Q."7quad 1.2.3+2.3.4+3.4.5+....n" terms "=

2.3+3.4+4.5+............n terms =

The value of the sum 1.2.3+2.3.4+3.4.5+… upto n terms is equal to

3.6+4.7+5.8+.....+(n-2) terms =

Find the sum of 2.3+3.4+4.5+......to n terms.

The sum to 100 terms of the series 1.2.3. + 2.3.4. + 3.4.5. + …+ n(n + 1) (n+2) + …. is integral multiple of

The sum to 100 terms of the series 1.2.3. + 2.3.4. + 3.4.5. + …+ n(n + 1) (n+2) + …. is integral multiple of

Find the sum to n terms of the series (1.2.3) + (2.3.4) + (3.4.5) ...