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128 equals x to the power 7 what is x how do i use logarithms to solve it?
Wiki User
∙ 14y ago
128 = x7 (we see that x > 0, since x is raised to an odd power)
27 = x7 (this is true only when x = 2)
2 = x
Remember that a logarithm is an exponent.
The statement 128 = x7 is equivalent to logx 128 = 7.
logx 128 = 7
log 128/log x = 7 (or reverse the both sides)
log x/log 128 = 1/7 (multiply by log 128 to both sides)
log x = log128/7 (or use base 10 for the logarithm)
log10 x = log128/7 (write the equivalent statement)
10log 128/7 = x
2 = x
or use the natural log, ln.
128 = x7
ln 128 = ln x7
ln 128 = 7ln x
(ln 128)/7 = ln x
e(ln128)/7 = elnx (elnx = x )
2 = x
Wiki User
∙ 14y ago
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How do you solve 8-3x equals 128?
8-3x = 128 -3x = 128-8 -3x = 120 x = -40
What does x equals when 2x equals 128?
find x when, 2x=128 2x=128 /2 /2 x=128 /2 x=64 then check your answer by doing the following if x=64, then what is 2x? 2(64)=? or 2 * 64=? or 2 x 64=? 2 times 64 equals 128!
What is the answer for x plus x equals 128?
x = 64 64 + 64 = 128
Can you show me the work on how to solve 16x2 - 24x plus 7 equals 0?
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How do you find the equation of a parabola in standard form with x intercepts at -2 and 6 passing through 1 and 8?
Since we know the intercepts, its best to solve the general form first and then convert to the standard form. The intercepts tell us that for some constant, a y=a*(x+2)(x-6) We also know that the parabola must run through a given point (1,8) so we can plug that value in to get our value of a 8=a*(3)(-5) a=-8/15 Next, expand the formula and start moving numbers around until you are in standard form y=-8/15*(x²-4x-12) y=-8/15*((x-2)²-16) y=-8/15*(x-2)²+128/15
What to the seventh power equals 128?
It is: 2 to the power of 7 = 128
What equals 2 to the 7th power?
2 to the 7th power equals 128....
How do you solve 8-3x equals 128?
8-3x = 128 -3x = 128-8 -3x = 120 x = -40
What to the power of 2 equals 128?
8
Solve for x 5x equals -123?
128
What does 2 to the 7 power equal?
27 equals 128
What number to the seventh power equals 128?
Two.Two.Two.Two.
What is 8x8x8x8 equals?
128
128 oz equals how many lb?
128 oz equals 8 pounds.
How do you solve x plus x plus x plus x equals 128?
To solve x + x + x + x, set the problem up as multiplication like this 4x = 128. Divide both sides of the problem by 4. You will get x = 32. To check your work, substitute 32 for the x and do the math. 4 x 32 = ?. If the answer is 128, the answer is correct.
Percent of 80 equals 128 What percent of 80 equals 128?
% rate = 160% = 128/80 * 100% = 1.6 * 100% = 160%
One gallon equals how many ounces?
128 fluid ounces
