If the total area of the cuboid is 11 and the sum of the lengths of the twelve edges is 24, then the length of a diagonal of the cuboid is () A. 23B. 14C. 5D. 6

If the total area of the cuboid is 11 and the sum of the lengths of the twelve edges is 24, then the length of a diagonal of the cuboid is () A. 23B. 14C. 5D. 6

Let the length, width and height of the cuboid be a, B and C respectively ①，2ab+2bc+2ac=11… ② From the square of 1 minus 2, we can get A2 + B2 + C2 = 25. The length of a diagonal of this cuboid is 5, so we choose C

The nth power formula of Mathematics (AX + b)
No,

N power of (AX + b) = (AX) n power + (AX) n-1 power multiplied by B + (AX) n-2 power multiplied by B +... + ax times b n-1 power + B N power

Derivation of the derivative of the power ax with E in Mathematics

The derivative to the power ax of E is the power ax of E times a,
Of course, the derivative of e to the - ax power is the - ax power of E times a
Remember to find the derivative of the exponential function. You can directly find the derivative of the exponential part, which is the power of E, and then put it in front of the exponential function