Write a program to print the following sum series (1+2+3) + (2+3+4) +

1.	Write a program to print the following sum series (1+2+3) + (2+3+4) + (3+4+5) …………… n terms. pls answer it correctly and it's urgent
Answer» Answer: Input : n = 10 Output : 4290 123 + 234 + 345 + 456 + 567 + 678 + 789 + 8910 + 91011 + 101112 = 6 + 24 + 60 + 120 + 210 + 336 + 504 + 720 + 990 + 1320 = 4290 Input : n = 7 Output : 1260

Write a program to print the following sum series (1+2+3) + (2+3+4) + (3+4+5) …………… n terms. pls answer it correctly and it's urgent

Answer»

Answer:

Input : n = 10

Output : 4290

1*2*3 + 2*3*4 + 3*4*5 + 4*5*6 + 5*6*7 + 6*7*8 +

7*8*9 + 8*9*10 + 9*10*11 + 10*11*12

= 6 + 24 + 60 + 120 + 210 + 336 + 504 +

720 + 990 + 1320

= 4290

Input : n = 7

Output : 1260