Questions and answers by

Ifi

Questions (15)

1. If -1/infinity = infinity or -infinity ?2. If lim x->infinity^- = infinity & lim x->inifinity^+ = -infinity, then lim
1. 0 answers
2. 578 views
Given table,X (1+x)^(1/x) -0.5. 4 -0.1 2.8680 -0.01 2.7320 -0.001 2.7196 0.001 2.7169 0.01 2.7048 0.1 2.5937 0 5 2.25 From the
1. 0 answers
2. 533 views
If f(x)=3x^2-5x, find the f'(2) & use it to find an equation of tangent line to the parabolay=3x^2-5x at the point (2,2). My ans
1. 1 answer
2. 1,298 views
Differentiate ln (1+ cos x)...My ans is (-sin x)/ (1+cos x), but at wolfram is -tan (x/2). I think they simplify it but how did
1. 1 answer
2. 436 views
Differentiate y=4^(3x^2)..i need to know the calculation step..thanks for the help....
1. 1 answer
2. 319 views
How to differentiate f(x)=e^(xlnx)?I get f'(x)=e^(xlnx) (1+lnx) while at wolfram is x^x(ln x+x)...sorry for my miscalculation /
1. 1 answer
2. 566 views
How to differentiate e^e^x?Ans at wolfram is e^(x+e^x). I need the calculation method.
1. 1 answer
2. 410 views
Differentiate f(x)= (8-2x)^3(x^2+1)^5.My ans is 2(8-2x)^2(x^2+1)^4(-3x^2-10x+37). Plz recheck my simplify ans. -my simplify ans
1. 3 answers
2. 499 views
Let f(x) be the parabola -x^2+16x-16. find the point (x,y) on f such that tangent line to f at (x,y) passes through the origin.M
1. 1 answer
2. 480 views
find the intervals of increase and decrease of f(x)=3/(x*2+11) -1 ?My f'(x) is-6x/(x^2+1)^2, after that i didn't know how to
1. 1 answer
2. 387 views
Calculate dy/dx, (x^3)(y^7) + 16xy^6=0My ans is (y(-16-3x^2y))/ x(96+7x^2y) but at wolfram is y^6(3x^2y+16). Btw i use product
1. 2 answers
2. 385 views
If f(1)=-2 & f'(x)_< 1.8 for 1_< x_< 8, what is the largest possible value of f(8)?Can someone help me on this question and plz
1. 2 answers
2. 385 views
Let f(t)=2t^4-2x^2-9. at what x does f have a local or absolute minimum or maximum?I think the question is wrong bcus it is
1. 1 answer
2. 447 views
dx/dy cos x sin y + x^5 = 11i got dx/dy= (-cos x cos y)/ (-sin x sin y +5x^4) But the wolfram got (1- cos x cos y)/(5x^4-sin y
1. 3 answers
2. 541 views
How to d/dxy= (9+((x-9)/6)^1/5)^1/2 ? Hope u can give me the way how to calculate it. ^^ I got 1/60 ((x-9)/6) ^ (-9/10), i think
1. 4 answers
2. 621 views