Penjelasan dengan langkah-langkah:
a. rumus fungsi: g(n) = n²+3n-10; h(n) = (n+4)(n-4)
b. nilai n, bila g(n) = h(n) , yaitu
n²+3n-10 = (n+4) (n-4) [selesaikan dengan cara pelangi]
n²+3n-10 = n²+4n-4n-16
n²+3n-10 = n²-16
n²-n²(pindah ruas) +3n = 10-16
3n = -6
n = -6/3
n = -2
c. g(5) - h(-4), maka
5²+3(5) -10 - [(-4)²-16]
25+15-10 - [16-16]
35-10-0
25
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Penjelasan dengan langkah-langkah:
a. rumus fungsi: g(n) = n²+3n-10; h(n) = (n+4)(n-4)
b. nilai n, bila g(n) = h(n) , yaitu
n²+3n-10 = (n+4) (n-4) [selesaikan dengan cara pelangi]
n²+3n-10 = n²+4n-4n-16
n²+3n-10 = n²-16
n²-n²(pindah ruas) +3n = 10-16
3n = -6
n = -6/3
n = -2
c. g(5) - h(-4), maka
5²+3(5) -10 - [(-4)²-16]
25+15-10 - [16-16]
35-10-0
25