Question

69th term -13,-33,-53 artihmatic sequnce

Answer 1

-1373

Explanation:

replace the 69th term with x

The sequence is subtracting 20 each time. After 13, there is 68 more numbers. So if we multiply them, we get x-13.

-20x68=-1360

Since we didn't count the 13 earlier, we have to subtract that back in.

-1360-13=-1373