Saturday
July 26, 2014

Posts by Mgraph


Total # Posts: 317

Calc 2
Read the terms of your problem!

Calc 2
y=... or r=...?

Math
A)A=Пr^2 B)dA/dt=dA/dr*dr/dt=2Пr*dr/dt C)dA/dt=2П*7*2cm^2/s=87.96cm^2/s

Algebra II
No. Sn=8(1-(-1)^9)/(1-(-1))=8*2/2=8

math!
1)40C6=40!/(6!x34!)=3,838,380 2)15C3=15!/(3!x12!)=455

math help!
30C5=30!/(5!x25!)=142,506

Discrete Math
f(0)=2x0=0=0 mod 5 f(1)=2x1=2=2 mod 5 f(2)=2x2=4=4 mod 5 f(3)=2x3=6=1 mod 5 f(4)=2x4=8=3 mod 5, so f(A)={0,1,2,3,4} a/- yes b/- yes

PRECALCULUS HELP PLEASE!
1)r=3cos(theta) r^2=3rcos(theta) x^2+y^2=3x 2)r=4cos(theta)-4sin(theta) r^2=4rcos(theta)-4rsin(theta) x^2+y^2=4x-4y x^2-4x +y^2+4y =0 x^2-4x+4+y^2+4y+4=4+4 (x-2)^2 +(y+2)^2=8 1)x^2+(y-1)^2=1 x^2+y^2-2y+1=1 x^2+y^2=2y r^2=2rsin(theta) r=2sin(theta) 2)(x-1)^2+(y+4)^2=17 x^2-2x+1...

Math
I think f(x)=2cos3x. f'(x)=-6sin3x maxf'(x)=6 if sin3x=-1 when x=-Pi/6 f(-Pi/6)=0 The equation of tangent y=6x+Pi

Lotto 5/90 maths
37 1 80 26 53

Math please help!
m(t)=9x2^(-t/192) 192=24x8 2.8=9x2^(-t/192) t=192xln(9/2.8)/ln2 t=323.4236495

calculus
p'=1/x' x'=3p^2-6p

math
We find a from a system: a +a+99d =7099.5 a+100d+a+199d=20799 We subtract from the 2nd the 1st: 200d=13699.5 d=68.4975 2a+99x68.4975=7099.5 a=159.12375 (0.12375=99/800)

math
cos(a)cos(b)-sin(a)sin(b)=cos(a+b) Answer:cos(45+120)=cos165

calculus
This value = H'(1)=-1/(2sqrt(6))

Calculus (urgent!!)
Critical number x=0 Increasing on interval (-Inf,0) Decreasing on interval (0,Inf) Local maxima x=0 Local minima x=none Concave up on (-Inf,-1)U(1,Inf) Concave down on (-1,1) Inflection points x=-1,x=1 Horizontal asymptotes y=0 Vertical asymptotes x=none

Calculus (pleas help!!!)
f'(x)=(x-5)^3+(x-2)3(x-5)^2=(4x-11)(x-5)^2 (A) Absmax=f(1)=64+11=75 Absmin=f(11/4)=-3^7/2^8+11=-2187/256+ +11=629/256 (B) Absmax=f(8)=173 Absmin=f(11/4)=629/256 (C) Absmax=f(9)=459 Absmin=f(4)=9

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