Question

Tolong dibantu yah! Besok kumpul! Makasih
In each of the following cases, make the letter in the brackets the subject of the formula.
a) S=[2a+(n-1)d] cari ---> [d]
b) +2=k cari ---> [h]
c) z= cari ---> [z]

Answer 1

A.
2s/n = 2a+(n-1)d
2s/n - 2a = (n-1)d
(2s - 2na) /n = (n-1)d
d = (2s-2na)/n : (n-1)
d = (2s-2na) / (n²-n)

b.
1/(h+1) = k-2
1 = kh-2-2h+k
k(h+1)-3-2h=0
k=(3+2h) / (h-1)

c.
xz = yz-y²
y² = yz-xz
y² = z(y-x)
z = y² / (y-x)