Question

2 2+3 w + 7 f 371 7? a 22-3-14 ·3·14:12 ​

Answer 1

$2 {}^{n + 3} \cdot7 {}^{n} + 7 {}^{n + 1} \cdot 2 {}^{n} - 3 \cdot 14 {}^{n} \\ = 2 {}^{n} \cdot 2 {}^{3} \cdot 7 {}^{n} + 7 {}^{n} \cdot 7 \cdot 2 {}^{n} - 3 \cdot 14 {}^{n} \\ = 7 {}^{n} \cdot 2 {}^{n} (2 {}^{3} + 7 - 3) \\ = 7 {}^{n} \cdot2 {}^{n} (8 + 4) \\ = 7 {}^{n} \cdot2 {}^{n} \cdot12 \\ \implies \: 7 {}^{n} \cdot2 {}^{n} \cdot12 \: \vdots \: 12$