find the sum of the first 36 terms in the arithmetic series -0.2 + 0.3 + 0.8 +...
a. 318.6
b. 332.2
c. 307.8
d. 315
i got 307.8
AM I RIGHT
^^^^when asking a math question with logarthmic functions...how do i use my keyboard to indcate the logarithm number
e15q2
a. 318.6
b. 332.2
c. 307.8
d. 315
i got 307.8
AM I RIGHT
^^^^when asking a math question with logarthmic functions...how do i use my keyboard to indcate the logarithm number
e15q2
-
t₁ = -0.2
t₂ = 0.3 = t₁ + 0.5
t₃ = 0.8 = t₂ + 0.5 = t₁ + 2(0.5)
...
The common difference is 0.5 and the starting term is -0.2.
The formula for the nth term is t₁ + (n-1)(0.5).
t₃₆ = -0.2 + 35(0.5) = 17.3
The sum of the first 36 terms is 36(t₁ + t₃₆)/2 = 307.8
=====
There is no simple way to display the base of a logarithm as a subscript, e.g., log₁₀(x).
The characters can be found on your computer (in Character Map on a pc and Special Characters on an iMac) and can be cut and pasted, but that gets tedious.
On a pc, certain characters can displayed by holding down the Alt- key and typing a four-digit code on the keypad. (For example, Alt-0179 is ³ and Alt-0251 is √). Unfortunately, I do not think that subscripts can be displayed this way.
On my iMac, I created a custom keyboard so I can type a math symbol with two keystrokes. That requires remapping the keyboard, for which I used an app called Ukelele.
Long story short: The simplest way to display the base of a logarithm is use ordinary characters to distinguish it from the argument of the logarithm. I do not know of any conventional notation for this, but you can make it obvious what you mean.
For example, log₂(x) should be understandable if written as
log_[10](x)
or
log(base10)(x)
etc.
t₂ = 0.3 = t₁ + 0.5
t₃ = 0.8 = t₂ + 0.5 = t₁ + 2(0.5)
...
The common difference is 0.5 and the starting term is -0.2.
The formula for the nth term is t₁ + (n-1)(0.5).
t₃₆ = -0.2 + 35(0.5) = 17.3
The sum of the first 36 terms is 36(t₁ + t₃₆)/2 = 307.8
=====
There is no simple way to display the base of a logarithm as a subscript, e.g., log₁₀(x).
The characters can be found on your computer (in Character Map on a pc and Special Characters on an iMac) and can be cut and pasted, but that gets tedious.
On a pc, certain characters can displayed by holding down the Alt- key and typing a four-digit code on the keypad. (For example, Alt-0179 is ³ and Alt-0251 is √). Unfortunately, I do not think that subscripts can be displayed this way.
On my iMac, I created a custom keyboard so I can type a math symbol with two keystrokes. That requires remapping the keyboard, for which I used an app called Ukelele.
Long story short: The simplest way to display the base of a logarithm is use ordinary characters to distinguish it from the argument of the logarithm. I do not know of any conventional notation for this, but you can make it obvious what you mean.
For example, log₂(x) should be understandable if written as
log_[10](x)
or
log(base10)(x)
etc.