class 9th math 3.1 solution

by

Question#1: Express each of the following numbers in scientific notations. Solution: \[\begin{align} & \text{Number  }\qquad &| \qquad &\text{Scientific Notation} \\ & \text{(i) }5700\qquad &| \qquad &5.7\times {{10}^{3}} \\ & \text{(ii) }49800000\qquad &| \qquad &4.9\times {{10}^{7}} \\ & \text{(iii) }96000000\qquad &| \qquad &9.6\times {{10}^{7}} \\ & \text{(iv) 416.9}\qquad &| \qquad &4.169\times {{10}^{2}} \\ & \text{(v) }83000\qquad &| \qquad &8.3\times {{10}^{4}} \\ & \text{(vi) … Read more

class 9th math 1.4 solution

by

Question#1: Which of the following product of matrices is conformable for multiplications? \(i\) \[\left[ \begin{matrix}  1 & -1  \\   0 & 2  \\\end{matrix} \right]\left[ \begin{matrix}   -2  \\   3  \\\end{matrix} \right]\] Solution: \[\begin{align}\left[ \begin{matrix}  1 & -1  \\   0 & 2  \\\end{matrix} \right]\left[ \begin{matrix}   -2  \\   3  \\\end{matrix} \right]\\\text{Order of first Matrix}&=2-by-\bbox[5px, border: 1px solid red]{2} … Read more