Do question number 14

Do question number 14 (D) q (E) None of these 14. ——4913, then find the value of n. If —+1+3x—+3x 4 (B) 10 (E) None of these and E) None of these CLASS-9 , then

Hi, \frac{2^{3 n}}{8} + 1 + 3 \times \frac{2^{n}}{2} + 3 \times \frac{2^{2 n}}{4} = 4913 2^{3 n} + 8 + 12 \times 2^{n} + 6 \times 2^{2 n} = 39304 2^{3 n} + 6 \times 2^{2 n} + 12 \times 2^{n} = 39296 Now its better to check from the option, as we know that 2^{10} = 1024 and 2^{15} = 32768 so putting n = 5 2^{15} + 6 \times 2^{10} + 12 \times 2^{5} = 32768 + 6144 + 768 \neq 39296 but close so none follows