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katrin [286]
2 years ago
6

1)

Mathematics
2 answers:
Yuri [45]2 years ago
6 0

Answer:

X = {8n – 7n – 1 : n ϵ N}

Y = {49 (n –1) : n ϵ N} — (1) [all terms divisible by 49]

X = {8n – 7n – 1}

= (1 + 7)n – 7n – 1

= 1 + nC1 7 + nC2 72 + ….. + nCn 7n – 7n – 1

= nC2 72 + …… + nCn 7n

= 49 [nC2 + nC3 7 + …. nCn 7n-2] — (2)

From (1) and (2),

X is divisible by 49.

Y has all multiples of 49.

X ⊂ Y

11Alexandr11 [23.1K]2 years ago
4 0

Answer:

to \: know \: the \: answer \:

refer \: to \: the \: above \: attatchment

<h3>Hope this helps you XD ✌️</h3><h2>Carry on learning !! </h2>

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