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xaxtusgod
19.03.2020 •
Mathematics
Find the 12th term of the arithmetic sequence given a3=116 and a7=180
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Ответ:
Step-by-step explanation:
nth term = a +(n-1)d
a3 = 116 ; a + 2d = 116 (i)
a7 = 180; a + 6d = 180 (ii)
multiply (ii) by -1. so a will be eliminated
a + 2d = 116 (i)
(ii)*-1 -a - 6d = -180 (ii) { Now add the two equations}
- 4d = -64
d = -64/-4
d = 16
Plug in the value of d in equation (i),
a + 2*16 = 116
a + 32 = 116
a = 116 - 32
a = 84
12th term = 84 + 11* 16 = 84 + 176 = 260
Ответ:
yes
Step-by-step explanation:
square root of 4 you mean?
square root of 4 is 2
2 can be written as 2/1
(it could be written as square root(4))/1
or it could be the simplest form of a more complex fraction
square root of 4 can also be written as 4^(1/2)
if you mean (square root(square root(square root(square root(x
that could be written as x^(1/2)^(1/2)^(1/2)^(1/2) which I think is equal to x^1/16 or 16'th root of x