If the edge length of a triangular pyramid is 3 cm, what is its surface area in square centimeter

If the edge length of a triangular pyramid is 3 cm, what is its surface area in square centimeter

Triple root 3

The surface area of a triangular pyramid with an edge length of 1 is______ ．

Each face of a triangular pyramid with an edge length of 1 is an equilateral triangle, and the edge length of an equilateral triangle is 1, ∥ the area of each face is 12 × 1 × 1 × 32 = 34, ∥ the surface area s = 3. So the answer is 3

The derivative of log (the third power of x-1)

If the base is a, the answer is (loga (x ^ 3-1)) '= 3x ^ 2 / (x ^ 3-1) * loga (E)

Find the derivative of y = (1-x ^ 2) secx * log (base a) x

y'=(1-x^2)'*secx*loga(x)+(1-x^2)*(secx)'*loga(x)+(1-x^2)secx*[loga(x)]'
=-2xsecx*loga(x)+(1-x^2)*secxtanx*loga(x)+(1-x^2)secx*/(xlna)

If log is based on 3, m < log is based on 2, n < 0, then the size of M, N, 0 is the same

logm

The logarithm of the base 3 of log is known

(1) m,n>1
Log with n as the base 3 log > 0 log with m as the base 3 log > 0
Log is the logarithm of base 3

Given the set M = {1, m}, n = {n, log2n}, if M = n, then (m-n) 2013=______ ．

If M = n, then n = 1log2n = m or log2n = 1n = m, that is, n = 1m = 0, then (m-n) 2013 = (- 1) 2013 = - 1. Or n = 2m = 2, then (m-n) 2013 = (2-2) 2013 = 0, so the answer is: - 1 or 0

If log m 3

log m 3

The size relation of three numbers a = 0.6 ^ 2, B = log ˇ 20.6, C = 2 ^ 0.6 is

a=0.6^2=0.36,0＜a＜1；
B = ㏒ 2 (0.6) look at the logarithmic function [f (x) = ㏒ ax (a > 1)] image, this is a number less than 0, B < 0;
C = 2 ^ 0.6 look at the image of exponential function [f (x) = a ^ x (a > 1)], this is a number greater than 1, C > 1
∴b＜0＜a＜1＜c
∴b＜a＜c

log（2）（a）=log（3）（b）=log（5）（c）

Let x = log (2) (a) = log (3) (b) = log (5) (c)