Question

If 1+2+3+......+n =666 . Find n

Answer 1

Answer:

n=−z+660

Step-by-step explanation:

Let's solve for n.

1+2+3+z+n=666

Step 1: Add -z to both sides.

n+z+6+−z=666+−z

n+6=−z+666

Step 2: Add -6 to both sides.

n+6+−6=−z+666+−6

n=−z+660

Answer 2

Answer:

n=666 .........,...

Use a+(n-1)d formula

a=1

d=1