Ankur Kumar

3 numbers in gp when product is given is: a/r , a , ar . Now , a/r ×a×ar= -64 =a^3=-64 =a= -4 Now it is given that first number is 4 times the third number so; a/r=4(ar) -4/r=4(-4r) -1/r=-4r 1/4=r^2 r=+or-1/2 So we have a =-4 and r=+1/2 and -1/2 . So we g...