उत तर:
# द र = 11 #
स पष ट करण:
# एक = (15,3, -4) #
# A_x = 15 #
# A_y = 3 #
# A_z = -4 #
# ब = (21, -6, -2) #
# B_x = 21 #
# B_y = -6 #
# B_z = -2 #
# X ^ 2 = (B_x-A_x) ^ 2 #
# x ^ 2 = (21-15) ^ 2 "" x ^ 2 = 6 ^ 2 "" x ^ 2 = 36 #
# Y ^ 2 = (B_y-A_y) ^ 2 #
# y ^ 2 = (- 6-3) ^ 2 "" b_y ^ 2 = -9 ^ 2 "" b_y ^ 2 = 81 # #
# Z ^ 2 = (B_z-A_z) ^ 2 #
# z ^ 2 = (- 2 + 4) ^ 2 "" z ^ 2 = 2 ^ 2 "" z ^ 2 = 4 #
# द र = sqrt (एक स ^ 2 + y ^ 2 + z ^ 2) #
# द र = sqrt (36 + 81 + 4) #
# द र = 11 #
