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Nadusha1986 [10]
2 years ago
6

12R If V= ---- (r+R) Make R the subject of the equation .

Mathematics
1 answer:
k0ka [10]2 years ago
6 0
V=\frac{12R}{r+R}
note, r and R are differnt
so multipl both sides by (r+R)
V(r+R)=12R
distribute
Vr+VR=12R
minus VR from both sides
Vr=12R-VR
undistribute R
Vr=R(12-V)
divide both sides by (12-V)
\frac{Vr}{12-V}=R or
R= \frac{Vr}{12-V}

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\sum\limits_{t=1}^{3}(4\cdot(\frac{1}{2})^{t-1})

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We can use a formula to find the sum, or, since there's only three terms, we can find the value of each term then add up the results.

4 · (½)¹⁻¹ = 4

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Help me I don’t understand this
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