Respuesta :

For an arithmetic progression, the general formula:

An = A1 + (n -1)d

For progression 1, we have:

d= -30, A1 = 27

A52 = 27 + (52 -1)x(-30) = -1503

For progression 2, we have:

A1 =40, d =-100

A52 = 40 + (52 -1)x(-100) = -5060

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