(11) Three coplanar forces not on the same straight line meeting at a point are in equilibrium, the magnitude of two forces of them are 7 and 3 newton, then the magnitude of the third could be ......... newton. \( \begin{array}{llll}\text { (a) } 10 & \text { (b) } 4 & \text { (c) } 5 & \text { (d) } 3\end{array} \)

d) For each of these lists of integers, provide a simple formula for rule that generates the terms of an integer sequence that begins with the given list. Assuming that your formula or rule is correct, determine the next three terms of the sequence. i. \( \quad 3,6,12,24,48,96,192, . \). Next three terms are \( 384,768,1536 \) ii. \( 15,8,1,-6,-13,-20,-27, . \). Next three terms are \( -34,-41,-48 \)

Write the arithmetic sequence \( -12,-9,-6,-3, \ldots \) in the standard form: \( a_{n}=\square \)

¿Cual es la raiz cuadrada de \( 25 ? * \)

1. \( x^{n} 2+5 x+6=0 \)

An arithmetic sequence is given below. \( -5,-2,1,4, \ldots \) Write an explicit formula for the \( n^{\text {th }} \) term \( a_{n} \).