tolong dijawab dengan cara no 1-9 plss
Materi : Bentuk Akar dan Pangkat
(4²)-³ = 4-⁶ { d. }
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2.9⁰ + 7² - 2⁰ = 2 + 49 - 1 = 50 { b. }
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0,00000008645 = 8,645 × 10-⁸ { a. }
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7/√21 = 7√21/21 = ⅓√21
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√75 + 6√12 - 2√48
= 5√3 + 12√3 - 8√3
= 9√3
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(243³)-¹/⁵ = [(3⁵)³]-¹/⁵ = 3-³ = 1/27 { b. }
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27²/³ × 32²/⁵ ÷ 6² = 3² × 2² ÷ ( 2² × 3² ) = 1 { c. }
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√500 - √125 - √80 = 10√5 - 5√5 - 4√5 = √5 { a. }
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12/( 3 + √5 )
= 12( 3 - √5 )/( 3 + √5 )( 3 - √5 )
= 12( 3 - √5 )/( 3² - [√5]² )
= 12( 3 - √5 )/( 9 - 5 )
= 12( 3 - √5 )/4
= 3( 3 - √5 )
= 9 - 3√5 { b. }
Semoga bisa membantu
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