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SCORPION-xisa [38]
2 years ago
10

HELP!

Mathematics
1 answer:
Vesna [10]2 years ago
4 0
A(n)=a+(n-1)d
A(40)= -1+(40-1)-4
A(40)= -1+39(-4)
A(40)= -1+(-156)
A(40)= -157
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