Question

решить уравнение 2*4^x-1 - 5*4^x+1= -312

Answer 1

2•4^( x - 1 ) - 5•4^( x + 1 ) = - 312
4^x • ( 2 • ( 1/4 ) - 5 • 4 ) = - 312
4^x • ( 0,5 - 20 ) = - 312
4^x = - 312 : ( - 19,5 )
4^x = 16
4^x = 4^2
X = 2