Intermediate/Advanced Algebra

For more advanced algebra topics, including Algebra II and Pre-Calculus.
S
Calculate the sum of digits of powers of 2: Let s_2(n) denote sum of digits in base-2 expansion of n
Replies
2
Views
1K
Steven G
Steven G
R
I can't understand how to do this ratio problem: 9a:7c = 4:7, 3b:5c = 5:3; show that a+b:b+c = 29:34
Replies
8
Views
3K
Raanikeri
R
N
basic algebraic manipulation task: use p = 2^x to rewrite 2*4^x + 2^{x+3} = 1 + 2^{x-2} as 8p^2 + 31p - 4 = 0
Replies
2
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2K
Steven G
Steven G
J
show that -ln(x-sqrt(x^2-1)) = ln(x+sqrt(x^2-1))
Replies
2
Views
2K
Steven G
Steven G
P
The curve 12x² - 5y² = 7 intersects the line 2p²x - 5y = 7 at the point (1,p).
Replies
11
Views
3K
lookagain
L
A
Find the equation of the line that passes the points (a, 0) and (c, d)
Replies
1
Views
673
anti-matter
A
N
quadratic intersecting circle: circle w/ center C(3,0) passes thru A(0,6); parabola passes thru 2 pts B, C, with...
Replies
8
Views
2K
nanase
N
M
Confusion with recurrences: C_N = C(N/2) + N, N/2 + N/4 + N/8 + ... = 2N
Replies
11
Views
4K
Mondo
M
Y
Sequence limit: Let Un be the sequence U(n+1)=ln⁡(1+Un) and Vn=1/U(n+1)−1/Un.
Replies
0
Views
524
Younx
Y
M
Isolate equation based on a2: Qa = (Cd*a2)/(sqrt(1 - (a2/a1))) * (sqrt(2*delta-P))/(P)
Replies
3
Views
1K
Dr.Peterson
Dr.Peterson
H
Need the right equation for something called perfscore
Replies
1
Views
1K
blamocur
blamocur
B
Logarithm: If log_5(3) = T, express log_5(9/125) in terms of T
Replies
2
Views
1K
Dr.Peterson
Dr.Peterson
A
A flare fired from the bottom of a gorge is visible only when the flare is above the rim. if it is fired with an initial velocity of 96 ft/sec....
Replies
8
Views
5K
Dr.Peterson
Dr.Peterson
F
Rewrite a log function: log_10(k) = log_10(k_init) - beta_k * e_vol
Replies
1
Views
938
Dr.Peterson
Dr.Peterson
A
linear algebra multiple-choice quiz (in Spanish)
Replies
1
Views
1K
stapel
stapel
L
please help w/ "Find vector b given a = 3i - j, a*b = -6, angle between a, b is 30 degrees
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3
Views
1K
blamocur
blamocur
N
how many positive integers m are there such that m^2 + 2017 is a perfect square?
Replies
10
Views
4K
khansaheb
K
R
Need a little help with a graph
Replies
6
Views
3K
Ramses823
R
K
A problem relating to small numbers: "Suppose we have a set of N natural numbers from 1 to 999...."
Replies
4
Views
1K
kajamix
K
S
geometric series: sum_{k=1,n} 25(0.2)^{k-1} and sum_{k=1,n} 8(-1/2)^k
Replies
1
Views
906
blamocur
blamocur
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