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CBSE Class 8 Answered

find the value of x.
Asked by kritikarautela16.8cpsb | 04 Jun, 2021, 08:05: PM
Expert Answer
begin mathsize 16px style 3 to the power of negative 7 end exponent cross times 3 to the power of 4 straight x minus 1 end exponent equals 3 to the power of negative 7 end exponent over 3 to the power of 5
rightwards double arrow 3 to the power of negative 7 plus 4 straight x space minus space 1 end exponent equals 3 to the power of negative 7 minus 5 space space end exponent...... space straight a to the power of straight m cross times straight a to the power of straight n equals straight a to the power of straight m plus straight n end exponent space and space straight a to the power of straight m divided by straight a to the power of straight n equals straight a to the power of straight m minus straight n end exponent
rightwards double arrow 3 to the power of negative 8 plus 4 straight x end exponent equals 3 to the power of negative 12 end exponent
Base space are space same.
rightwards double arrow negative 8 plus 4 straight x space equals space minus 12
rightwards double arrow space 4 straight x space equals space minus 4
rightwards double arrow space space space straight x space equals space minus 1 end style
Answered by Yasmeen Khan | 04 Jun, 2021, 10:27: PM
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