Question

Find the value of k if(-2)k+1×(-2)3=(-2)7

Answer 1

Hey mate!!

$- 2k + 1 \times ( - 2)3 = ( - 2)7 \\ - 2k + 1 \times ( - 6) = - 14 \\ - 2k + ( - 6) = - 14 \\ - 2k - 6 = - 14 \\ 14 - 6 = 2k \\ 2k = 8 \\ k = \frac{8}{2} \\ k = 4$

Hence, k = 4

Hope it helps

Answer 2

Hey mate!!

$- 2k + 1 \times ( - 2)3 = ( - 2)7 \\ - 2k + 1 \times ( - 6) = - 14 \\ - 2k + ( - 6) = - 14 \\ - 2k - 6 = - 14 \\ 14 - 6 = 2k \\ 2k = 8 \\ k = \frac{8}{2} \\ k = 4$

Hence, k = 4

Hope it helps