Question

-

Answer 1

where is number 7 and 8?

Answer 2

@abe.hassan2

Answer 3

4400

Answer 4

for #1?

Answer 5

yes

Answer 6

ok, tell you how i got it.

Answer 7

ok.. then #2?

Answer 8

you want the 50th term in 1, so, a sub 50= asub 1 + (n-1)d

Answer 9

so, asub 1 is the first term, which is negative 10

Answer 10

d is the difference

Answer 11

-10 + (49)4

Answer 12

= 186

Answer 13

is the 50 therm

Answer 14

so for the sum, asub50 times (-10 + 186) divided by 2

Answer 15

equals 4400

Answer 16

http://hotmath.com/hotmath_help/topics/sum-of-the-first-n-terms-of-an-arithmetic-sequence.html

Answer 17

ok! thanks :) what about #2?

Answer 18

@abe.hassan2 ??