The first three terms of an arithmetic progression are t, 2t-1, 2t+4. Calculate the value of t.

Answer 1

To be an arithmetic progression,

(2t-1) - t = (2t+4) - (2t-1)

solve for t

Answer 2

2.5

Answer 3

(2t-1)-t=(2t+4)- (2t-1) 2t-1-t=2t+4-2t+1 collect like terms 2t-2t+2t=4+1+1 2t=6 divide 2 both side 2t/2=6/2 t=3