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Sagot :
Answer:
64
Step-by-step explanation:
Un=a+(n-1)d
given that Un is the number of terms which we're looking for
Un=1+(22-1)3
Un=1+(21)3
Un=1+63
Un=64
Answer:
Step-by-step explanation:
a1=1 a2=4 for every one, you add a 3 so 3*21=63 63+1=64 and that's the answer
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