No. 1 - Universityku

2 – akar 5 per 2 + akar 5= …..

No. 2
a = 3 + $sqrt{2}$ dan b = -3 + $sqrt{2}$
ab / a+b = ….

No. 3
$2_{log}$ 5 = a, $7_{log}$ 2 = b. Maka $35_{log}$ 98 = ….

No. 4
Jika A = $left[begin{array}{ccc}1&-2&\-3&4end{array}right]$ dan B = $left[begin{array}{ccc}4&3\2&1\end{array}right]$ maka $(A+B)^{2}$ =…

No. 5
Nilai x yg memenuhi $left[begin{array}{ccc}4&x-2\3&2\end{array}right] + left[begin{array}{ccc}-6&8\-11&-6\end{array}right] = 2 left[begin{array}{ccc}3&1\-2&4\end{array}right] left[begin{array}{ccc}0&3\-1&1\end{array}right]$ adalah ….

YANG ADA TULISAN amp; itu sebenernya bukan apa-apa jadi abaikan saja

No. 1

No.2
a = 3 + dan b = -3 +
ab / a+b = ….

$frac{a.b}{a+b} = frac{(3+ sqrt{2})(-3+ sqrt{2}) }{(3+ sqrt{2})+(-3+ sqrt{2})} = frac{-9+3 sqrt{2} -3 sqrt{2}+2 }{3+ sqrt{2}-3+ sqrt{2} } = frac{-7}{2 sqrt{2} }$
$frac{-7}{2 sqrt{2} } x frac{2 sqrt{2}}{2 sqrt{2}} = frac{-14 sqrt{2} }{8}$
tinggal disederhanain deh 🙂

no. 3
A = dan B = maka =…

jadi A+B tinggal ditambahin kayak biasa. terus dikaliin.

1 -2 4 3 5 2
+ =
-3 4 2 1 -1 5

5 2 5 2 5.5+2.(-1) 5.2+2.5 25-2=23 20
. = =
-1 5 -1 5 -1.5+5(-1) -1(2)+5.5 -10 23

nah itu hasilnya dicek lagi ya 🙂