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OxtFoenem
01.07.2019 •
Mathematics
If 5+20*2^(2-3x)=10*2^(-2x)+5, what is the value of x? a –3 b –2 c 2 d 3
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Ответ:
Step 2: divide by 10 on both sides
Then you have: 2*2^(2-3x) = 2^(-2x)
The factor 2 on the left can be brought into the exponent because you're simply multiplying with 2 more...
2^(1+2-3x) = 2^(-2x)
Now you can equate the exponents:
3-3x = -2x => 3 = -2x+3x => x=3
so d is your answer.
Ответ: