Advertisements
Advertisements
प्रश्न
Differentiate the function with respect to x:
`(5x)^(3cos 2x)`
Advertisements
उत्तर
Let y = `(5x)^(3cos 2x)`
Taking log on both sides, we get
log y = 3 cos 2x log (5x) = 3 cos 2x [log 5 + log x]
log y = 3 cos 2x log 5 + 3 cos 2x log x ....(1)
Differentiating (1) with respect to x, we get
`1/y dy/dx = 3 log 5 (-sin 2x)* 2 + (3 cos 2x)/x + 3 log x (-2 sin 2x)`
= `-6 log 5 sin 2x + (3 cos 2x)/x - 6 log x sin 2x`
`dy/dx = (5x)^(3cos 2x) [(3 cos 2x)/x - 6 (log 5 + log x) sin 2x]`
= `(5x)^(3 cos 2x) [(3 cos 2x)/x - 6 log 5x sin 2x]`
APPEARS IN
संबंधित प्रश्न
Differentiate the function with respect to x.
`(sin (ax + b))/cos (cx + d)`
Prove that the function f given by f(x) = |x − 1|, x ∈ R is not differentiable at x = 1.
Differentiate the function with respect to x:
(3x2 – 9x + 5)9
Differentiate the function with respect to x:
sin3 x + cos6 x
Differentiate the function with respect to x:
`(cos^(-1) x/2)/sqrt(2x+7)`, −2 < x < 2
Differentiate the function with respect to x:
`x^(x^2 -3) + (x -3)^(x^2)`, for x > 3
Find `dy/dx`, if y = 12 (1 – cos t), x = 10 (t – sin t), `-pi/2 < t < pi/2`.
If f(x) = |x|3, show that f"(x) exists for all real x and find it.
Does there exist a function which is continuos everywhere but not differentiable at exactly two points? Justify your answer?
If sin y = xsin(a + y) prove that `(dy)/(dx) = sin^2(a + y)/sin a`
`"If y" = (sec^-1 "x")^2 , "x" > 0 "show that" "x"^2 ("x"^2 - 1) (d^2"y")/(d"x"^2) + (2"x"^3 - "x") (d"y")/(d"x") - 2 = 0`
If f(x) = x + 1, find `d/dx (fof) (x)`
If y = tan(x + y), find `("d"y)/("d"x)`
If y = tanx + secx, prove that `("d"^2y)/("d"x^2) = cosx/(1 - sinx)^2`
Show that the function f(x) = |sin x + cos x| is continuous at x = π.
`sin sqrt(x) + cos^2 sqrt(x)`
(x + 1)2(x + 2)3(x + 3)4
`tan^-1 (secx + tanx), - pi/2 < x < pi/2`
`sec^-1 (1/(4x^3 - 3x)), 0 < x < 1/sqrt(2)`
`tan^-1 ((3"a"^2x - x^3)/("a"^3 - 3"a"x^2)), (-1)/sqrt(3) < x/"a" < 1/sqrt(3)`
For the curve `sqrt(x) + sqrt(y)` = 1, `"dy"/"dx"` at `(1/4, 1/4)` is ______.
Let f: R→R and f be a differentiable function such that f(x + 2y) = f(x) + 4f(y) + 2y(2x – 1) ∀ x, y ∈ R and f’(0) = 1, then f(3) + f’(3) is ______.
If f(x) = `{{:(ax + b; 0 < x ≤ 1),(2x^2 - x; 1 < x < 2):}` is a differentiable function in (0, 2), then find the values of a and b.
Differentiability determines whether a function has what at a particular point?
For \[v\ne0\], what is the derivative of \[\frac{u}{v}\]?
What is \[\frac{d}{dx}(x^n)\]?
What is \[\frac{d}{dx}(\sin x)\]?
What is \[\frac{d}{dx}(\cos x)\]?
A function is differentiable at \[x=c\] when which condition holds?
Which limit is the right-hand derivative at \[x=c\]?
For differentiability on a closed interval \[[a,b]\], which derivative is considered at \[b\]?
For \[x\ne c\], which identity is used to prove that differentiability implies continuity?
What does differentiability at a point mean?
