como resuelvo esto (sec x + tan x) (1 – sen x) = cos x necesito ayuda con este tambn
Dada las funciones f (x)= 3x - 2; g (x) = x3. Determine:
a) (f + g)(2) b) (f - g) (2) c) (f g) (2) d) (f / g) (2)
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hl amigo ya me voy chao pescao
- (sec x + tan x)(1 - sen x) = cos x
( 1 + sen x )(1 - sen x) = cos x
cos x cos x
( 1 + sen x )(1 - sen x) = cos x
cos x
( 12 - (sen x)2 ) = cos x
cos x
(cos x )2 = cos x
cos x
cos x = cos x
- (f + g)(2)
f(x) + g(x) = 3x -2 + x3 = x3 + 3x - 2
(f + g)(2) = (2)3 + 3(2) - 2 = 8 + 6 - 2 = 12
- (f - g)(2)
f(x) - g(x) = 3x -2 - x3 = - x3 + 3x - 2
(f - g)(2) = - (2)3 + 3(2) - 2 = - 8 + 6 - 2 = - 4
- (f . g)(2)
f(x) . g(x) = (3x -2) . (x3) = 3x4 - 2x3
(f - g)(2) = 3(2)4 - 2(2)3 = 3(16) - 2(8) = 48 - 16 = 32
- (f / g)(2)
f(x) / g(x) = (3x -2) / (x3) = (3/x2) - (2/x3)
(f / g)(2) = (3/(2)2) - (2/(2)3) = (3/4) - (2/8) = (3/4) - (1/4) = (3-1)/4 = 2/4 = 1/2