let f(x) = 2x + 3. If f(a + 1) = 7, then f(a) is equal to ....
Matematika
radit00
Pertanyaan
let f(x) = 2x + 3. If f(a + 1) = 7, then f(a) is equal to ....
1 Jawaban
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1. Jawaban ariyat
f(a+1) = 7
2(a+1) + 3 = 7
2a + 2 + 3 = 7
2a + 5 = 7
2a = 7-5
2a = 2
a = 1