#MAAHL00012

a) d = u_{2} - u_{1}

d = 1.8 - 0.5

d = 1.3



b) u_{30} = u_{1} + (30-1)(1.3)

u_{30} = 0.5 + (29)(1.3)

u_{30} = 0.5 + 37.7

u_{30} = 38.2

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