7he nwmber behween 3864 and 3870 is a) 3688

\( \int u d v = u _ { 0 } v - \int v \cdot d u \)

find the numberterm in an Ap Given it first term and Last tem arek i3 and 23 respectively and that it commion difference is \( -2 \frac{1}{4} \)

Question 2 Find the smallest value of \( n \) that produces an \( x^{-9} \) term in the expansion of \( x^{-2}\left(\frac{7}{x^{3}}+5 x^{5}\right)^{n} \), where \( n \in \mathbb{Z} \) .

82 Ordena de menor a mayor. a) \( \frac{11}{5}, \frac{9}{5}, \frac{13}{5}, \frac{7}{5} \)

(1) \( \cot ^{2}(\theta)-\csc ^{2}(\theta) \)