Question

Help with two questions?

http://prntscr.com/d1a0c3
http://prntscr.com/d1a0od

Answer 1

@563blackghost

Answer 2

The first answer must be A

Answer 3

are you sure?

Answer 4

Tn - Tn-1 = -3
put n=2
T2 - T1 = -3
T2- 17 = -3
T2= 17-3
T2= 14

Answer 5

yes pretty sure

Answer 6

ok ty and any ideas on the second?

Answer 7

let -2 , a1, a2, a3, 10 be in an arithmetic progression

Answer 8

so we basically need to find the common difference of this arithmetic progression
number of terms n =5 ;
first term is -2 and last term is 10;
so 10 = -2 + (5-1)*d
which gives d=3 on simpliflying;

Answer 9

a1= -2+3 =1
a2= 1+3 = 4
a3 = 4+3 =7
so the answer has to be C

Answer 10

Ok thank you sooooo much!