Question

pls i needs you guys help now please answer these questions
1). insert 6A.M btw -8 and 10
2). 3 consécutive term of an A.P are t+2 t+3 and 2t(square)+1. find the possible value of t for t>0. find the nth term given t+2 is the first term.
3). if a-1 b-1 c-1 d-1 are A.P proove that b=2ac/a+b and find b/a in terms of a and c.


pls pls help me it is very urgent i will Mark you brainless​

Answer 1

1). -8&10

-8,A1,A2,A3,A4,A5,A6,10

d=b-a/n+1

d=10-(-8)/6+1

d=10+8/7

d=18/7

A1=-8+18/7 =-38/7

A2=-38/7+18/7=-20/7

A3=-20/7+18/7=-2/7

A4=-2/7+18/7=16/7

A5=16/7+18/7=34/7

A6=34/7+18/7=52/7

b=52/7+18/7=70/7=10

Therfore btw -8 & 10 6A.M are inserted