kk tolong dibantuin hari ini dikumpul

1. 216^2 = 466556^1/3
= 36
2. 2√6 × √15 = 6√10 : 2√2
= 6√5
5. C

jawab
1.
(216²)⁻¹/³=
= (216)⁻²/³
= (6³)⁻²/³
= (6)⁻²
= 1/6²
= 1/36

2. 
2√6 . √15  : 2√2
= 2√90  : 2√2
= √45
= √9. √5
= 3√5

3. 
18 /(4 - √10) =
= 18 ( 4 + √10) / (4 - √10)(4 + √10)
= 18 (4 + √10) /  (16-10)
= 18 (4 + √10)/ 6
= 18/6 (4 + √10)
= 3 (4 + √10)
= 12 + 3√10

4)
4, 8, 12 --> 4n
pola ke12--> 4(12) = 48

5) n  = 6
u2   =10
u5 = 80
u5 /u2 = 80/10 
r³ = 8 
r  = 2

u2 = 10
a r  = 10
a = 10/r = 10/2 = 5
panjang tali = S6
S6 = a. (r⁶ -1) / (r - 1)
s6 =  5 (2⁶ -1) / (2-1)
s6 = 5(63) = 315